High 8.1Published Nov 12, 2025

CVE-2025-40133mptcp: Use __sk_dst_get() and dst_dev_rcu() in mptcp_active_enable().

Updated under an hour ago (Oct 26, 2026, 4:10 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: mptcp: Use __sk_dst_get() and dst_dev_rcu() in mptcp_active_enable(). mptcp_active_enable() is called from subflow_finish_connect(), which is icsk->icsk_af_ops->sk_rx_dst_set() and it's not always under RCU. Using sk_dst_get(sk)->dev could trigger UAF. Let's use __sk_dst_get() and dst_dev_rcu().

CVSS: 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Deferred
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 27069e7cb3d1cea9377069266acf19b9cc5ad0ae before ad16235c9d3ef7ec17c109ff39b7504f49d17072; from 27069e7cb3d1cea9377069266acf19b9cc5ad0ae before cc976ec9e38bb79409de3261ba1dbb6868e2a53e; 27069e7cb3d1cea9377069266acf19b9cc5ad0ae builds before 893c49a78d9f85e4b8081b908fb7c407d018106a	CNA record

References

References

https://git.kernel.org/stable/c/ad16235c9d3ef7ec17c109ff39b7504f49d17072
https://git.kernel.org/stable/c/cc976ec9e38bb79409de3261ba1dbb6868e2a53e
https://git.kernel.org/stable/c/893c49a78d9f85e4b8081b908fb7c407d018106a

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.