Description
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 products
linux: linux kernel
References8
- git.kernel.org/stable/c/531c537b8fb620beabccfb1594e8d43cbebbb87a Patch
- git.kernel.org/stable/c/6a3af482188f6db4186d1605f64d911d7330abb3 Patch
- git.kernel.org/stable/c/8143a224785ceaf2b0856e08d4498916f38228fb Patch
- git.kernel.org/stable/c/b74ad20198652b6b39a761c277ba65ae82b1e107 Patch
- git.kernel.org/stable/c/b7b9a461569734d33d3259d58d2507adfac107ed Patch
- git.kernel.org/stable/c/1f26487e83e69462540bb1047139472957c913c6
- git.kernel.org/stable/c/5da972efed3dc7599da6e2b5e8d906d1b7b1a728
- git.kernel.org/stable/c/aa8cabde7e83bf96269ee47427dc9b59e3ed8e60
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 15 November 2026
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