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CVE-2026-74746

9.8 · CRITICAL

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 ownin…

Published Aug 26, 2026EPSS 0.54%

Overview

CVE-2026-74746 is a critical-severity vulnerability. It was published on August 26, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.).

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/0a00254585827f1695aa2700114af622ea754cfaRefgit.kernel.org/stable/c/2014ac62df9d45bb9a004a043e85df7be09ed780Refgit.kernel.org/stable/c/211ee5d998d92a7d548811939c65942d06c146e4Refgit.kernel.org/stable/c/972fdf7c4f5c282a239c88fea614b056c33dc025Refgit.kernel.org/stable/c/be345dcbddb4643a54252b954af974b16eda8f91Refgit.kernel.org/stable/c/d16b71231e65cb05daea2b45701fcf09cef041e7Refgit.kernel.org/stable/c/d37917e7bebe078f3c17e47fd6fc1c9f6e8497b2Refgit.kernel.org/stable/c/d9d3050a70efe217e73a0751e55fdae6a7092620

How CyberStrike helps

Frequently asked questions

What is CVE-2026-74746?

CVE-2026-74746 is a critical-severity vulnerability. It was published on August 26, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-74746?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-74746?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-74746?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-74746 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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