{"id":"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.).","modified":"2026-08-28T03:47:13.048452325Z","published":"2026-08-26T14:36:55.963Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74746.json","cna_assigner":"Linux"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ac2a66665e231847cab11b8c8e844ce43207dd2e"},{"fixed":"0a00254585827f1695aa2700114af622ea754cfa"},{"fixed":"be345dcbddb4643a54252b954af974b16eda8f91"},{"fixed":"211ee5d998d92a7d548811939c65942d06c146e4"},{"fixed":"d37917e7bebe078f3c17e47fd6fc1c9f6e8497b2"},{"fixed":"972fdf7c4f5c282a239c88fea614b056c33dc025"},{"fixed":"d9d3050a70efe217e73a0751e55fdae6a7092620"},{"fixed":"d16b71231e65cb05daea2b45701fcf09cef041e7"},{"fixed":"2014ac62df9d45bb9a004a043e85df7be09ed780"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74746.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.16.0"},{"fixed":"5.10.266"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.217"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.184"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.153"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.105"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.46"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74746.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}