Medium severity5.5NVD Advisory· Published May 28, 2026· Updated Sep 14, 2026
CVE-2026-46158
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".
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Affected products
20- osv-coords15 versionspkg:linux/kernelpkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0
>= 5.10.0, < 5.10.270+ 14 more
- (no CPE)range: >= 5.10.0, < 5.10.270
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 7.0.11-1.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1.160000.2.19
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/25e37407442b8766ec2cf52fb4e31b5c3d3aeeaenvdPatch
- git.kernel.org/stable/c/9426265e157dd77ec237c795901ed4dea6d69b5cnvdPatch
- git.kernel.org/stable/c/9634cb35af17019baec21ca648516ce376fa10e6nvdPatch
- git.kernel.org/stable/c/acd3d3562315c99f3c0db16f0fcc5f0306638982nvdPatch
- git.kernel.org/stable/c/b41dd76f3b9735096c21d3e799a2b9fe36498d57nvdPatch
- git.kernel.org/stable/c/81d8142148164176385c279c7c1e1d581867423dnvd
- git.kernel.org/stable/c/e9ba34301d2e90f63f97c76ad9eb98e5250fe961nvd
- git.kernel.org/stable/c/f5555a6d7c472849fdf2b426e3d0a85103118793nvd
News mentions
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