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CVE-2026-23169

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix race in mptcp_pm_nl_flush_addrs_doit() syzbot and Eulgyu Kim reported crashes in mptcp_pm_nl_get_local_id() and/or m…

Published Feb 14, 2026CWE-362EPSS 0.14%

Overview

CVE-2026-23169 is a high-severity vulnerability. It was published on February 14, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

mptcp: fix race in mptcp_pm_nl_flush_addrs_doit()

syzbot and Eulgyu Kim reported crashes in mptcp_pm_nl_get_local_id()

and/or mptcp_pm_nl_is_backup()

Root cause is list_splice_init() in mptcp_pm_nl_flush_addrs_doit()

which is not RCU ready.

list_splice_init_rcu() can not be called here while holding pernet->lock

spinlock.

Many thanks to Eulgyu Kim for providing a repro and testing our patches.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/1f1b9523527df02685dde603f20ff6e603d8e4a1Refgit.kernel.org/stable/c/338d40bab283da2639780ee3e458fb61f1567d8cRefgit.kernel.org/stable/c/455e882192c9833f176f3fbbbb2f036b6c5bf555Refgit.kernel.org/stable/c/51223bdd0f60b06cfc7f25885c4d4be917adba94Refgit.kernel.org/stable/c/7896dbe990d56d5bb8097863b2645355633665ebRefgit.kernel.org/stable/c/e2a9eeb69f7d4ca4cf4c70463af77664fdb6ab1d

How CyberStrike helps

Frequently asked questions

What is CVE-2026-23169?

CVE-2026-23169 is a high-severity vulnerability. It was published on February 14, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-23169?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-23169?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-23169?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-23169 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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