Riskcovery

CVE-2026-46170

mptcp: pm: ADD_ADDR rtx: free sk if last

State
Published
Severity
Not scored
Published
May 28, 2026
Updated
Sep 14, 2026
Reserved
May 13, 2026

Read the record on cve.org

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".

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before aa8cabde7e83bf96269ee47427dc9b59e3ed8e60Affected
  • 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 1f26487e83e69462540bb1047139472957c913c6Affected
  • 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 5da972efed3dc7599da6e2b5e8d906d1b7b1a728Affected
  • 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 6a3af482188f6db4186d1605f64d911d7330abb3Affected
  • 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 531c537b8fb620beabccfb1594e8d43cbebbb87aAffected
  • 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before b74ad20198652b6b39a761c277ba65ae82b1e107Affected
  • 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 8143a224785ceaf2b0856e08d4498916f38228fbAffected
  • 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before b7b9a461569734d33d3259d58d2507adfac107edAffected
LinuxLinux
  • 5.10Affected
  • before 5.10Not affected
  • 5.10.270 through 5.10.*Not affected
  • 5.15.218 through 5.15.*Not affected
  • 6.1.185 through 6.1.*Not affected
  • 6.6.142 through 6.6.*Not affected
  • 6.12.92 through 6.12.*Not affected
  • 6.18.30 through 6.18.*Not affected
  • 7.0.7 through 7.0.*Not affected
  • 7.1 and laterNot affected

References

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