CVE-2026-46170
In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: ADD_ADDR rtx: free sk if last When an ADD_ADDR is retransmitted, the sk is held in sk_reset_timer(), and released at the end. If at that moment, it was the last reference being held, the sk would not be freed. sock_put() should then be called instead of __sock_put(). But that's not enough: if it is the last reference, sock_put() will call sk_free(), which will end up calling sk_stop_timer_sync() on the same timer, and waiting indefinitely to finish. So it is needed to mark that the timer is done at the end of the timer handler when it has not been rescheduled, not to call sk_stop_timer_sync() on "itself".
Affected versions
Linux kernel versions
5.10
and later are affected. Fixed in
6.6.142,
6.12.92,
6.18.30,
7.0.7,
7.1-rc3
and their respective stable series.
References
The following references provide additional information about CVE-2026-46170 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
-
PatchKernel patch commithttps://git.kernel.org/stable/c/531c537b8fb620beabccfb1594e8d43cbebbb87a
-
PatchKernel patch commithttps://git.kernel.org/stable/c/6a3af482188f6db4186d1605f64d911d7330abb3
-
PatchKernel patch commithttps://git.kernel.org/stable/c/8143a224785ceaf2b0856e08d4498916f38228fb
Frequently asked questions
-
What is CVE-2026-46170?
CVE-2026-46170 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.10 onward and has been patched in 6.6.142, 6.12.92, 6.18.30 and others. CVE-2026-46170 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
-
Is there a patch available for CVE-2026-46170?
Yes — CVE-2026-46170 has been patched. Fixed versions include 6.6.142, 6.12.92, 6.18.30 and others. If you are running Linux kernel 5.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
-
Is CVE-2026-46170 actively exploited?
No — CVE-2026-46170 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.