CVE-2026-46158
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().
Does this matter?
Lower severity and a low EPSS score (0.13%). Track it; it rarely justifies an emergency change on its own.
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".
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/25e37407442b8766ec2cf52fb4e31b5c3d3aeeaePatch
- https://git.kernel.org/stable/c/81d8142148164176385c279c7c1e1d581867423d
- https://git.kernel.org/stable/c/9426265e157dd77ec237c795901ed4dea6d69b5cPatch
- https://git.kernel.org/stable/c/9634cb35af17019baec21ca648516ce376fa10e6Patch
- https://git.kernel.org/stable/c/acd3d3562315c99f3c0db16f0fcc5f0306638982Patch
- https://git.kernel.org/stable/c/b41dd76f3b9735096c21d3e799a2b9fe36498d57Patch
- https://git.kernel.org/stable/c/e9ba34301d2e90f63f97c76ad9eb98e5250fe961
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.