Medium 5.5Published May 28, 2026

CVE-2026-46170mptcp: pm: ADD_ADDR rtx: free sk if last

Updated under an hour ago (Oct 26, 2026, 7:40 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: 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".

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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: Modified
Record last updated: Sep 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 00cfd77b9063dcdf3628a7087faba60de85a9cc8 before aa8cabde7e83bf96269ee47427dc9b59e3ed8e60; from 00cfd77b9063dcdf3628a7087faba60de85a9cc8 before 1f26487e83e69462540bb1047139472957c913c6; from 00cfd77b9063dcdf3628a7087faba60de85a9cc8 before 5da972efed3dc7599da6e2b5e8d906d1b7b1a728; from 00cfd77b9063dcdf3628a7087faba60de85a9cc8 before 6a3af482188f6db4186d1605f64d911d7330abb3; from 00cfd77b9063dcdf3628a7087faba60de85a9cc8 before 531c537b8fb620beabccfb1594e8d43cbebbb87a; from 00cfd77b9063dcdf3628a7087faba60de85a9cc8 before b74ad20198652b6b39a761c277ba65ae82b1e107; from 00cfd77b9063dcdf3628a7087faba60de85a9cc8 before 8143a224785ceaf2b0856e08d4498916f38228fb; from 00cfd77b9063dcdf3628a7087faba60de85a9cc8 before b7b9a461569734d33d3259d58d2507adfac107ed	CNA record
linux linux_kernel linux:linux_kernel	from 5.10 before 6.6.142; from 6.7 before 6.12.92; from 6.13 before 6.18.30; from 6.19 before 7.0.7; 7.1; 7.1	NVD

References

References

https://git.kernel.org/stable/c/aa8cabde7e83bf96269ee47427dc9b59e3ed8e60
https://git.kernel.org/stable/c/1f26487e83e69462540bb1047139472957c913c6
https://git.kernel.org/stable/c/5da972efed3dc7599da6e2b5e8d906d1b7b1a728
https://git.kernel.org/stable/c/6a3af482188f6db4186d1605f64d911d7330abb3	patch
https://git.kernel.org/stable/c/531c537b8fb620beabccfb1594e8d43cbebbb87a	patch
https://git.kernel.org/stable/c/b74ad20198652b6b39a761c277ba65ae82b1e107	patch
https://git.kernel.org/stable/c/8143a224785ceaf2b0856e08d4498916f38228fb	patch
https://git.kernel.org/stable/c/b7b9a461569734d33d3259d58d2507adfac107ed	patch

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.