CVE-2026-74746

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 v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0a00254585827f1695aa2700114af622ea754cfa
https://git.kernel.org/stable/c/2014ac62df9d45bb9a004a043e85df7be09ed780
https://git.kernel.org/stable/c/211ee5d998d92a7d548811939c65942d06c146e4
https://git.kernel.org/stable/c/972fdf7c4f5c282a239c88fea614b056c33dc025
https://git.kernel.org/stable/c/be345dcbddb4643a54252b954af974b16eda8f91
https://git.kernel.org/stable/c/d16b71231e65cb05daea2b45701fcf09cef041e7
https://git.kernel.org/stable/c/d37917e7bebe078f3c17e47fd6fc1c9f6e8497b2
https://git.kernel.org/stable/c/d9d3050a70efe217e73a0751e55fdae6a7092620

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-26 15:16

Updated : 2026-08-27 06:17

NVD link : CVE-2026-74746

Mitre link : CVE-2026-74746

CVE.ORG link : CVE-2026-74746

JSON object : View

Products Affected

No product.

CWE

No CWE.

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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.)."}], "lastModified": "2026-08-27T06:17:25.033", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}