CVE-2026-31418

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.

• git.kernel.orghttps://git.kernel.org/stable/c/58f3a14826d4e6b0d5421f1a64be280b48601ea2
• git.kernel.orghttps://git.kernel.org/stable/c/68ca0eea0af02bed36c5e2c13e9fa1647c31a7d4
• git.kernel.orghttps://git.kernel.org/stable/c/6cea34d7ec6829b62f521a37a287f670144a2233
• git.kernel.orghttps://git.kernel.org/stable/c/9862ef9ab0a116c6dca98842aab7de13a252ae02
• git.kernel.orghttps://git.kernel.org/stable/c/ad92ee87462f9a3061361d392e9dbfe2e5c1c9fb
• git.kernel.orghttps://git.kernel.org/stable/c/b7eef00f08b92b0b9efe8ae0df6d0005e6199323
• git.kernel.orghttps://git.kernel.org/stable/c/c098ff857e7ca923539164af5b3c2fe3e8f8afaf
• git.kernel.orghttps://git.kernel.org/stable/c/ceacaa76f221a6577aba945bb8873c2e640aeba4
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-019113.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-082556.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-457936.html

No related CVEs by CWE or product.