CVE-2026-23169

Kernel crash via non-RCU address-list splice

Published Feb 14, 2026 · Updated Feb 14, 2026

Race condition in the Linux Kernel MPTCP path allows local users to crash the kernel through concurrent address flush and lookup operations. mptcp_pm_nl_flush_addrs_doit() uses list_splice_init() on an address list that concurrent RCU readers access without compatible synchronization. Low-privileged local access is required, and the demonstrated consequence is a kernel crash during MPTCP address handling.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux Kernel MPTCP path allows local users to crash the kernel through concurrent address flush and lookup operations. mptcp_pm_nl_flush_addrs_doit() uses list_splice_init() on an address list that concurrent RCU readers access without compatible synchronization. Low-privileged local access is required, and the demonstrated consequence is a kernel crash during MPTCP address handling.

The record

CVE
CVE-2026-23169
Published
Feb 14, 2026
Updated
Feb 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-362, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=141694df6573b49aa4143c92556544b4b0bbda72 <1f1b9523527df02685dde603f20ff6e603d8e4a1
  2. Affected versionversion=141694df6573b49aa4143c92556544b4b0bbda72 <e2a9eeb69f7d4ca4cf4c70463af77664fdb6ab1d
  3. Affected versionversion=5.11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=141694df6573b49aa4143c92556544b4b0bbda72 <1f1b9523527df02685dde603f20ff6e603d8e4a1; version=141694df6573b49aa4143c92556544b4b0bbda72 <e2a9eeb69f7d4ca4cf4c70463af77664fdb6ab1d; version=5.11

Published CVSS scores

7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.7NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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