CVE-2026-31418

MediumCVSS 5.5/10Last modified Nov 10, 2026

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected software

No affected versions have been published.

Timeline

Published
Apr 13, 2026
Last modified
Nov 10, 2026
NVD status
Modified

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CVE-2026-31418: Medium severity, CVSS 5.5 | Vulnix