{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43084","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-01T14:12:55.983Z","datePublished":"2026-05-06T07:40:19.253Z","dateUpdated":"2026-05-11T22:17:24.983Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:17:24.983Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_queue: make hash table per queue\n\nSharing a global hash table among all queues is tempting, but\nit can cause crash:\n\nBUG: KASAN: slab-use-after-free in nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue]\n[..]\n nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue]\n nfnetlink_rcv_msg+0x46a/0x930\n kmem_cache_alloc_node_noprof+0x11e/0x450\n\nstruct nf_queue_entry is freed via kfree, but parallel cpu can still\nencounter such an nf_queue_entry when walking the list.\n\nAlternative fix is to free the nf_queue_entry via kfree_rcu() instead,\nbut as we have to alloc/free for each skb this will cause more mem\npressure."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/net/netfilter/nf_queue.h","net/netfilter/nfnetlink_queue.c"],"versions":[{"version":"371de2bef6582a3f58049b3d18e190924af9c9a0","lessThan":"22730cb96093b5be0609063bbb1923dbecd61252","status":"affected","versionType":"git"},{"version":"870e3e63da8e88daffe9d692a025c711658018a8","lessThan":"41e3652a178cb0eecd48e0e6e27fbb73a004046a","status":"affected","versionType":"git"},{"version":"70e2e3ce4f6841e12ec1c104fc76c0e707398ec4","lessThan":"9e5ebef91120d2764aefe557c3a484b6288f341f","status":"affected","versionType":"git"},{"version":"e19079adcd26a25d7d3e586b1837493361fdf8b6","lessThan":"936206e3f6ff411581e615e930263d6f8b78df9d","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/net/netfilter/nf_queue.h","net/netfilter/nfnetlink_queue.c"],"versions":[{"version":"6.12.75","lessThan":"6.12.83","status":"affected","versionType":"semver"},{"version":"6.18.14","lessThan":"6.18.24","status":"affected","versionType":"semver"},{"version":"6.19.4","lessThan":"6.19.14","status":"affected","versionType":"semver"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.75","versionEndExcluding":"6.12.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18.14","versionEndExcluding":"6.18.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19.4","versionEndExcluding":"6.19.14"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/22730cb96093b5be0609063bbb1923dbecd61252"},{"url":"https://git.kernel.org/stable/c/41e3652a178cb0eecd48e0e6e27fbb73a004046a"},{"url":"https://git.kernel.org/stable/c/9e5ebef91120d2764aefe557c3a484b6288f341f"},{"url":"https://git.kernel.org/stable/c/936206e3f6ff411581e615e930263d6f8b78df9d"}],"title":"netfilter: nfnetlink_queue: make hash table per queue","x_generator":{"engine":"bippy-1.2.0"}}}}