CVE-2026-31418
netfilter: ipset: drop logically empty buckets in mtype_del
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
7th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Apr 13, 2026 |
| Last Updated | Apr 18, 2026 |
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Affected Versions
Linux / Linux
8af1c6fbd9239877998c7f5a591cb2c88d41fb66 < c098ff857e7ca923539164af5b3c2fe3e8f8afaf 8af1c6fbd9239877998c7f5a591cb2c88d41fb66 < 58f3a14826d4e6b0d5421f1a64be280b48601ea2 8af1c6fbd9239877998c7f5a591cb2c88d41fb66 < ad92ee87462f9a3061361d392e9dbfe2e5c1c9fb 8af1c6fbd9239877998c7f5a591cb2c88d41fb66 < 6cea34d7ec6829b62f521a37a287f670144a2233 8af1c6fbd9239877998c7f5a591cb2c88d41fb66 < b7eef00f08b92b0b9efe8ae0df6d0005e6199323 8af1c6fbd9239877998c7f5a591cb2c88d41fb66 < 68ca0eea0af02bed36c5e2c13e9fa1647c31a7d4 8af1c6fbd9239877998c7f5a591cb2c88d41fb66 < ceacaa76f221a6577aba945bb8873c2e640aeba4 8af1c6fbd9239877998c7f5a591cb2c88d41fb66 < 9862ef9ab0a116c6dca98842aab7de13a252ae02 6c717726f341fd8f39a3ec2dcf5d98d9d28a2769 d2997d64dfa65082236bca1efd596b6c935daf5e
Linux / Linux
5.6
References
git.kernel.org: https://git.kernel.org/stable/c/c098ff857e7ca923539164af5b3c2fe3e8f8afaf git.kernel.org: https://git.kernel.org/stable/c/58f3a14826d4e6b0d5421f1a64be280b48601ea2 git.kernel.org: https://git.kernel.org/stable/c/ad92ee87462f9a3061361d392e9dbfe2e5c1c9fb git.kernel.org: https://git.kernel.org/stable/c/6cea34d7ec6829b62f521a37a287f670144a2233 git.kernel.org: https://git.kernel.org/stable/c/b7eef00f08b92b0b9efe8ae0df6d0005e6199323 git.kernel.org: https://git.kernel.org/stable/c/68ca0eea0af02bed36c5e2c13e9fa1647c31a7d4 git.kernel.org: https://git.kernel.org/stable/c/ceacaa76f221a6577aba945bb8873c2e640aeba4 git.kernel.org: https://git.kernel.org/stable/c/9862ef9ab0a116c6dca98842aab7de13a252ae02