{"id":"CVE-2026-74746","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-74746","summary":"netfilter: flowtable: publish GC-visible tuple last","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: flowtable: publish GC-visible tuple last\n\nnf_flow_table_iterate() only treats original-direction tuple nodes as\nowning entries. Publishing the original node first lets GC observe and\nfree a flow while flow_offload_add() is still inserting the reply node.\nPublish the reply node first and the original node last so GC never\nsees a partially installed flow.\n\nKASAN can trigger slab-use-after-free read and write reports in the\nflowtable/rhashtable path (rht_deferred_worker, jhash, flow_offload_del,\nflow_offload_lookup, etc.).","published":"2026-08-26T14:36:55.963Z","modified":"2026-08-28T03:47:13.048452325Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"5.10.266"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0a00254585827f1695aa2700114af622ea754cfa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2014ac62df9d45bb9a004a043e85df7be09ed780"},{"type":"WEB","url":"https://git.kernel.org/stable/c/211ee5d998d92a7d548811939c65942d06c146e4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/972fdf7c4f5c282a239c88fea614b056c33dc025"},{"type":"WEB","url":"https://git.kernel.org/stable/c/be345dcbddb4643a54252b954af974b16eda8f91"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d16b71231e65cb05daea2b45701fcf09cef041e7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d37917e7bebe078f3c17e47fd6fc1c9f6e8497b2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d9d3050a70efe217e73a0751e55fdae6a7092620"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74746.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74746"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-28T03:47:13.048452325Z"}}