{"id":"CVE-2026-74746","title":"netfilter: flowtable: publish GC-visible tuple last","summary":"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 …","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= ac2a66665e231847cab11b8c8e844ce43207dd2e < 0a00254585827f1695aa2700114af622ea754cfa","Linux >= ac2a66665e231847cab11b8c8e844ce43207dd2e < be345dcbddb4643a54252b954af974b16eda8f91","Linux >= ac2a66665e231847cab11b8c8e844ce43207dd2e < 211ee5d998d92a7d548811939c65942d06c146e4","Linux >= ac2a66665e231847cab11b8c8e844ce43207dd2e < d37917e7bebe078f3c17e47fd6fc1c9f6e8497b2","Linux >= ac2a66665e231847cab11b8c8e844ce43207dd2e < 972fdf7c4f5c282a239c88fea614b056c33dc025","Linux >= ac2a66665e231847cab11b8c8e844ce43207dd2e < d9d3050a70efe217e73a0751e55fdae6a7092620","Linux >= ac2a66665e231847cab11b8c8e844ce43207dd2e < d16b71231e65cb05daea2b45701fcf09cef041e7","Linux >= ac2a66665e231847cab11b8c8e844ce43207dd2e < 2014ac62df9d45bb9a004a043e85df7be09ed780","Linux 4.16"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-16T19:16:14.907909Z"},"published":"2026-08-26","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:26:23.781Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74746","references":[{"url":"https://git.kernel.org/stable/c/0a00254585827f1695aa2700114af622ea754cfa"},{"url":"https://git.kernel.org/stable/c/be345dcbddb4643a54252b954af974b16eda8f91"},{"url":"https://git.kernel.org/stable/c/211ee5d998d92a7d548811939c65942d06c146e4"},{"url":"https://git.kernel.org/stable/c/d37917e7bebe078f3c17e47fd6fc1c9f6e8497b2"},{"url":"https://git.kernel.org/stable/c/972fdf7c4f5c282a239c88fea614b056c33dc025"},{"url":"https://git.kernel.org/stable/c/d9d3050a70efe217e73a0751e55fdae6a7092620"},{"url":"https://git.kernel.org/stable/c/d16b71231e65cb05daea2b45701fcf09cef041e7"},{"url":"https://git.kernel.org/stable/c/2014ac62df9d45bb9a004a043e85df7be09ed780"}],"tags":["cve.org"],"epss":0.00536,"epssPercentile":0.43958,"ingestedAt":"2026-10-16T19:46:24.323Z","slug":"CVE-2026-74746","body":"## Overview\n\nIn 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.).\n\n## Affected\n\n- `Linux >= ac2a66665e231847cab11b8c8e844ce43207dd2e < 0a00254585827f1695aa2700114af622ea754cfa`\n- `Linux >= ac2a66665e231847cab11b8c8e844ce43207dd2e < be345dcbddb4643a54252b954af974b16eda8f91`\n- `Linux >= ac2a66665e231847cab11b8c8e844ce43207dd2e < 211ee5d998d92a7d548811939c65942d06c146e4`\n- `Linux >= ac2a66665e231847cab11b8c8e844ce43207dd2e < d37917e7bebe078f3c17e47fd6fc1c9f6e8497b2`\n- `Linux >= ac2a66665e231847cab11b8c8e844ce43207dd2e < 972fdf7c4f5c282a239c88fea614b056c33dc025`\n- `Linux >= ac2a66665e231847cab11b8c8e844ce43207dd2e < d9d3050a70efe217e73a0751e55fdae6a7092620`\n- `Linux >= ac2a66665e231847cab11b8c8e844ce43207dd2e < d16b71231e65cb05daea2b45701fcf09cef041e7`\n- `Linux >= ac2a66665e231847cab11b8c8e844ce43207dd2e < 2014ac62df9d45bb9a004a043e85df7be09ed780`\n- `Linux 4.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}