Answer in brief
CVE-2026-74746 records a Critical severity (CVSS 9.8) vulnerability in netfilter: flowtable: publish GC-visible tuple last. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ac2a66665e231847cab11b8c8e844ce43207dd2e <0a00254585827f1695aa2700114af622ea754cfa || >=ac2a66665e231847cab11b8c8e844ce43207dd2e <be345dcbddb4643a54252b954af974b16eda8f91 || >=ac2a66665e231847cab11b8c8e844ce43207dd2e <211ee5d998d92a7d548811939c65942d06c146e4 || >=ac2a66665e231847cab11b8c8e844ce43207dd2e <d37917e7bebe078f3c17e47fd6fc1c9f6e8497b2 || >=ac2a66665e231847cab11b8c8e844ce43207dd2e <972fdf7c4f5c282a239c88fea614b056c33dc025 || >=ac2a66665e231847cab11b8c8e844ce43207dd2e <d9d3050a70efe217e73a0751e55fdae6a7092620 || >=ac2a66665e231847cab11b8c8e844ce43207dd2e <d16b71231e65cb05daea2b45701fcf09cef041e7 || >=ac2a66665e231847cab11b8c8e844ce43207dd2e <2014ac62df9d45bb9a004a043e85df7be09ed780 | 0a00254585827f1695aa2700114af622ea754cfa, be345dcbddb4643a54252b954af974b16eda8f91, 211ee5d998d92a7d548811939c65942d06c146e4, d37917e7bebe078f3c17e47fd6fc1c9f6e8497b2, 972fdf7c4f5c282a239c88fea614b056c33dc025, d9d3050a70efe217e73a0751e55fdae6a7092620, d16b71231e65cb05daea2b45701fcf09cef041e7, 2014ac62df9d45bb9a004a043e85df7be09ed780 |
| Linux/Linuxgeneric | 4.16 | Not reported |
Published upstream
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 26, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: publish GC-visible tuple last nf_flow_table_iterate() only treats original-direction tuple nodes as owning entries. Publishing the original node first lets GC observe and free a flow while flow_offload_add() is still inserting the reply node. Publish the reply node first and the original node last so GC never sees a partially installed flow. KASAN can trigger slab-use-after-free read and write reports in the flowtable/rhashtable path (rht_deferred_worker, jhash, flow_offload_del, flow_offload_lookup, etc.).
Quoted source text, attributed separately from HOL analysis.