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CVE-2026-74704

8.2 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter The sch_cake ACK filter parses packets to find the TCP…

Published Aug 22, 2026EPSS 0.44%

Overview

CVE-2026-74704 is a high-severity vulnerability. It was published on August 22, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. 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:

net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter

The sch_cake ACK filter parses packets to find the TCP header and filter

duplicated ACKs if the flow is backlogged. The parsing code contains a

WARN_ON(1) which can be triggered by a malformed IP header in certain

cases. Depending on the system configuration, this leads either to

either spamming dmesg with warnings, or a panic if panic_on_warn is set.

The code already correctly skips the offending packet in the branch that

triggers the warning, so the WARN_ON itself doesn't really serve any

purpose. So just drop it altogether to avoid the inconvenient side

effects.

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/0c4882bff34558d8d53fb04c3e96da5c327c7dc8Refgit.kernel.org/stable/c/2504a76e5c0694e14e15562730e1339f2d9f9458Refgit.kernel.org/stable/c/2a33516f9ef59ad11844d4fc152f889449b5daf3Refgit.kernel.org/stable/c/a1ae353d8355407c1bea971d1c1af5e7f242bb7dRefgit.kernel.org/stable/c/a4b52612004a5639c4bfc30ba93ba414b8326e2aRefgit.kernel.org/stable/c/ae1b2f8e21a41e7c7e75511bea0c4ccc59ec1bd3Refgit.kernel.org/stable/c/c1693b7844a6c06d31a565e5a494948034dfd235Refgit.kernel.org/stable/c/cd2f1d9fe8a507c2dc86ad326fe221f121c47734

How CyberStrike helps

Frequently asked questions

What is CVE-2026-74704?

CVE-2026-74704 is a high-severity vulnerability. It was published on August 22, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).

How severe is CVE-2026-74704?

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-74704?

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-2026-74704?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-74704 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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