CVE-2026-46158
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".
How to fix
- linux linux_kernel6.6.142, 6.12.92, 6.18.30, 7.0.7 or later
- git.kernel.org/stable/c/25e37407442b8766ec2cf52fb4e31b5c3d3aeeae
- git.kernel.org/stable/c/9426265e157dd77ec237c795901ed4dea6d69b5c
- git.kernel.org/stable/c/9634cb35af17019baec21ca648516ce376fa10e6
- git.kernel.org/stable/c/acd3d3562315c99f3c0db16f0fcc5f0306638982
- git.kernel.org/stable/c/b41dd76f3b9735096c21d3e799a2b9fe36498d57
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.10 ≤ v < 6.6.142, 6.7 ≤ v < 6.12.92, 6.13 ≤ v < 6.18.30, 6.19 ≤ v < 7.0.7, 7.1 | 6.6.142, 6.12.92, 6.18.30, 7.0.7 |
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