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CVE-2026-23169
mptcp: fix race in mptcp_pm_nl_flush_addrs_doit()
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.

INFO

Published Date :

Feb. 14, 2026, 4:15 p.m.

Last Modified :

Feb. 19, 2026, 4:27 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2026-23169 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
Update the Linux kernel to resolve a race condition in mptcp_pm_nl_flush_addrs_doit().
  • Update the Linux kernel.
  • Apply provided patches.
  • Test the fix.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-23169.

URL Resource
https://git.kernel.org/stable/c/1f1b9523527df02685dde603f20ff6e603d8e4a1
https://git.kernel.org/stable/c/338d40bab283da2639780ee3e458fb61f1567d8c
https://git.kernel.org/stable/c/455e882192c9833f176f3fbbbb2f036b6c5bf555
https://git.kernel.org/stable/c/51223bdd0f60b06cfc7f25885c4d4be917adba94
https://git.kernel.org/stable/c/7896dbe990d56d5bb8097863b2645355633665eb
https://git.kernel.org/stable/c/e2a9eeb69f7d4ca4cf4c70463af77664fdb6ab1d
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-23169 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-23169 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-23169 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-23169 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Feb. 19, 2026

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/338d40bab283da2639780ee3e458fb61f1567d8c
    Added Reference https://git.kernel.org/stable/c/7896dbe990d56d5bb8097863b2645355633665eb
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Feb. 16, 2026

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/455e882192c9833f176f3fbbbb2f036b6c5bf555
    Added Reference https://git.kernel.org/stable/c/51223bdd0f60b06cfc7f25885c4d4be917adba94
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Feb. 14, 2026

    Action Type Old Value New Value
    Added 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.
    Added Reference https://git.kernel.org/stable/c/1f1b9523527df02685dde603f20ff6e603d8e4a1
    Added Reference https://git.kernel.org/stable/c/e2a9eeb69f7d4ca4cf4c70463af77664fdb6ab1d
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
No CVSS metrics available for this vulnerability.