CVE-2026-46158

mptcp: pm: ADD_ADDR rtx: always decrease sk refcount

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

Description

In the Linux kernel, the following vulnerability has been resolved:

mptcp: pm: ADD_ADDR rtx: always decrease sk refcount

When an ADD_ADDR is retransmitted, the sk is held in sk_reset_timer(). It should then be released in all cases at the end.

Some (unlikely) checks were returning directly instead of calling sock_put() to decrease the refcount. Jump to a new 'exit' label to call __sock_put() (which will become sock_put() in the next commit) to fix this potential leak.

While at it, drop the '!msk' check which cannot happen because it is never reset, and explicitly mark the remaining one as "unlikely".

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before f5555a6d7c472849fdf2b426e3d0a85103118793Affected 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before e9ba34301d2e90f63f97c76ad9eb98e5250fe961Affected 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 81d8142148164176385c279c7c1e1d581867423dAffected 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 9426265e157dd77ec237c795901ed4dea6d69b5cAffected 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before b41dd76f3b9735096c21d3e799a2b9fe36498d57Affected 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before acd3d3562315c99f3c0db16f0fcc5f0306638982Affected 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 25e37407442b8766ec2cf52fb4e31b5c3d3aeeaeAffected 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 9634cb35af17019baec21ca648516ce376fa10e6Affected
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

Product

Versions

LinuxLinux

00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before f5555a6d7c472849fdf2b426e3d0a85103118793Affected
00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before e9ba34301d2e90f63f97c76ad9eb98e5250fe961Affected
00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 81d8142148164176385c279c7c1e1d581867423dAffected
00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 9426265e157dd77ec237c795901ed4dea6d69b5cAffected
00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before b41dd76f3b9735096c21d3e799a2b9fe36498d57Affected
00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before acd3d3562315c99f3c0db16f0fcc5f0306638982Affected
00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 25e37407442b8766ec2cf52fb4e31b5c3d3aeeaeAffected
00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 9634cb35af17019baec21ca648516ce376fa10e6Affected

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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