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.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
8af1c6fbd9239877998c7f5a591cb2c88d41fb66 affected < ad92ee87462f9a3061361d392e9dbfe2e5c1c9fb
8af1c6fbd9239877998c7f5a591cb2c88d41fb66 affected < 6cea34d7ec6829b62f521a37a287f670144a2233
8af1c6fbd9239877998c7f5a591cb2c88d41fb66 affected < b7eef00f08b92b0b9efe8ae0df6d0005e6199323
8af1c6fbd9239877998c7f5a591cb2c88d41fb66 affected < 68ca0eea0af02bed36c5e2c13e9fa1647c31a7d4
8af1c6fbd9239877998c7f5a591cb2c88d41fb66 affected < ceacaa76f221a6577aba945bb8873c2e640aeba4
8af1c6fbd9239877998c7f5a591cb2c88d41fb66 affected < 9862ef9ab0a116c6dca98842aab7de13a252ae02
6c717726f341fd8f39a3ec2dcf5d98d9d28a2769 affected —
d2997d64dfa65082236bca1efd596b6c935daf5e affected —
Linux Linux affected
Version Status Constraints
5.6 affected —
0 unaffected < 5.6
6.1.168 unaffected ≤ 6.1.*
6.6.134 unaffected ≤ 6.6.*
6.12.81 unaffected ≤ 6.12.*
6.18.22 unaffected ≤ 6.18.*
6.19.12 unaffected ≤ 6.19.*
7.0 unaffected ≤ *

No data.

No data.

No data.

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/68ca0eea0af02bed36c5e2c13e9fa1647c31a7d4 cve-icon cve-icon
https://git.kernel.org/stable/c/6cea34d7ec6829b62f521a37a287f670144a2233 cve-icon cve-icon
https://git.kernel.org/stable/c/9862ef9ab0a116c6dca98842aab7de13a252ae02 cve-icon cve-icon
https://git.kernel.org/stable/c/ad92ee87462f9a3061361d392e9dbfe2e5c1c9fb cve-icon cve-icon
https://git.kernel.org/stable/c/b7eef00f08b92b0b9efe8ae0df6d0005e6199323 cve-icon cve-icon
https://git.kernel.org/stable/c/ceacaa76f221a6577aba945bb8873c2e640aeba4 cve-icon cve-icon
History

Mon, 13 Apr 2026 13:45:00 +0000

Type Values Removed Values Added
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.
Title netfilter: ipset: drop logically empty buckets in mtype_del
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-04-13T13:21:05.316Z

Reserved: 2026-03-09T15:48:24.087Z

Link: CVE-2026-31418

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-04-13T14:16:11.267

Modified: 2026-04-13T14:16:11.267

Link: CVE-2026-31418

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.