Critical 9.8Published Aug 26, 2026

CVE-2026-74746netfilter: flowtable: publish GC-visible tuple last

Updated under an hour ago (Oct 26, 2026, 11:25 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.).

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from ac2a66665e231847cab11b8c8e844ce43207dd2e before 0a00254585827f1695aa2700114af622ea754cfa; from ac2a66665e231847cab11b8c8e844ce43207dd2e before be345dcbddb4643a54252b954af974b16eda8f91; from ac2a66665e231847cab11b8c8e844ce43207dd2e before 211ee5d998d92a7d548811939c65942d06c146e4; from ac2a66665e231847cab11b8c8e844ce43207dd2e before d37917e7bebe078f3c17e47fd6fc1c9f6e8497b2; from ac2a66665e231847cab11b8c8e844ce43207dd2e before 972fdf7c4f5c282a239c88fea614b056c33dc025; from ac2a66665e231847cab11b8c8e844ce43207dd2e before d9d3050a70efe217e73a0751e55fdae6a7092620; from ac2a66665e231847cab11b8c8e844ce43207dd2e before d16b71231e65cb05daea2b45701fcf09cef041e7; from ac2a66665e231847cab11b8c8e844ce43207dd2e before 2014ac62df9d45bb9a004a043e85df7be09ed780	CNA record

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.