CVE-2026-74746
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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.).
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | ac2a66665e231847cab11b8c8e844ce43207dd2e < 0a00254585827f1695aa2700114af622ea754cfa | affected |
| Linux | Linux | ac2a66665e231847cab11b8c8e844ce43207dd2e < be345dcbddb4643a54252b954af974b16eda8f91 | affected |
| Linux | Linux | ac2a66665e231847cab11b8c8e844ce43207dd2e < 211ee5d998d92a7d548811939c65942d06c146e4 | affected |
| Linux | Linux | ac2a66665e231847cab11b8c8e844ce43207dd2e < d37917e7bebe078f3c17e47fd6fc1c9f6e8497b2 | affected |
| Linux | Linux | ac2a66665e231847cab11b8c8e844ce43207dd2e < 972fdf7c4f5c282a239c88fea614b056c33dc025 | affected |
| Linux | Linux | ac2a66665e231847cab11b8c8e844ce43207dd2e < d9d3050a70efe217e73a0751e55fdae6a7092620 | affected |
| Linux | Linux | ac2a66665e231847cab11b8c8e844ce43207dd2e < d16b71231e65cb05daea2b45701fcf09cef041e7 | affected |
| Linux | Linux | ac2a66665e231847cab11b8c8e844ce43207dd2e < 2014ac62df9d45bb9a004a043e85df7be09ed780 | affected |
| Linux | Linux | 4.16 | affected |
| Linux | Linux | 0 < 4.16 | unaffected |
| Linux | Linux | 5.10.266 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.217 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.184 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.153 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.105 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.46 <= 6.18.* | unaffected |
| Linux | Linux | 7.1.10 <= 7.1.* | unaffected |
| Linux | Linux | 7.2 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/0a00254585827f1695aa2700114af622ea754cfa
- https://git.kernel.org/stable/c/be345dcbddb4643a54252b954af974b16eda8f91
- https://git.kernel.org/stable/c/211ee5d998d92a7d548811939c65942d06c146e4
- https://git.kernel.org/stable/c/d37917e7bebe078f3c17e47fd6fc1c9f6e8497b2
- https://git.kernel.org/stable/c/972fdf7c4f5c282a239c88fea614b056c33dc025
- https://git.kernel.org/stable/c/d9d3050a70efe217e73a0751e55fdae6a7092620
- https://git.kernel.org/stable/c/d16b71231e65cb05daea2b45701fcf09cef041e7
- https://git.kernel.org/stable/c/2014ac62df9d45bb9a004a043e85df7be09ed780
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