Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: drop logically empty buckets in mtype_del mtype_del() counts empty slots below n->pos in k, but it only drops the bucket when both n->pos and k are zero. This misses buckets whose live entries have all been removed while n->pos still points past deleted slots. Treat a bucket as empty when all positions below n->pos are unused and release it directly instead of shrinking it further.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.4.24, < 5.5 |
References
- https://git.kernel.org/stable/c/58f3a14826d4e6b0d5421f1a64be280b48601ea2Patch
- https://git.kernel.org/stable/c/68ca0eea0af02bed36c5e2c13e9fa1647c31a7d4Patch
- https://git.kernel.org/stable/c/6cea34d7ec6829b62f521a37a287f670144a2233Patch
- https://git.kernel.org/stable/c/9862ef9ab0a116c6dca98842aab7de13a252ae02Patch
- https://git.kernel.org/stable/c/ad92ee87462f9a3061361d392e9dbfe2e5c1c9fbPatch
- https://git.kernel.org/stable/c/b7eef00f08b92b0b9efe8ae0df6d0005e6199323Patch
- https://git.kernel.org/stable/c/c098ff857e7ca923539164af5b3c2fe3e8f8afafPatch
- https://git.kernel.org/stable/c/ceacaa76f221a6577aba945bb8873c2e640aeba4Patch
FAQ
What is CVE-2026-31418?
CVE-2026-31418 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: drop logically empty buckets in mtype_del mtype_del() counts empty slots below n->pos in k, but it only drops th...
How severe is CVE-2026-31418?
CVE-2026-31418 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-31418?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.