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CVE-2026-23318

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Use correct version for UAC3 header validation The entry of the validators table for UAC3 AC header descriptor…

Published Mar 25, 2026CWE-125EPSS 0.13%

Overview

CVE-2026-23318 is a high-severity vulnerability. It was published on March 25, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

ALSA: usb-audio: Use correct version for UAC3 header validation

The entry of the validators table for UAC3 AC header descriptor is

defined with the wrong protocol version UAC_VERSION_2, while it should

have been UAC_VERSION_3. This results in the validator never matching

for actual UAC3 devices (protocol == UAC_VERSION_3), causing their

header descriptors to bypass validation entirely. A malicious USB

device presenting a truncated UAC3 header could exploit this to cause

out-of-bounds reads when the driver later accesses unvalidated

descriptor fields.

The bug was introduced in the same commit as the recently fixed UAC3

feature unit sub-type typo, and appears to be from the same copy-paste

error when the UAC3 section was created from the UAC2 section.

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/0dcd1ed96c03459cf14706885c9dd3c1fd8bd29fRefgit.kernel.org/stable/c/1e5753ff4c2e86aa88516f97a224c90a3d0b133eRefgit.kernel.org/stable/c/499ffd15b00dc91ac95c28f76959dfb5cdcc84d5Refgit.kernel.org/stable/c/54f9d645a5453d0bfece0c465d34aaf072ea99faRefgit.kernel.org/stable/c/82a7d0a1b88798de1a609130080ce0c65dd869e9Refgit.kernel.org/stable/c/8307d93e63d5f54ef10412d4db2dd551e920dee4Refgit.kernel.org/stable/c/a0c6ae2ea84528f198bf7fd0117f12fd0cf6d7ccRefgit.kernel.org/stable/c/d3904ca40515272681ae61ad6f561c24f190957f

How CyberStrike helps

Frequently asked questions

What is CVE-2026-23318?

CVE-2026-23318 is a high-severity vulnerability. It was published on March 25, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-23318?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-23318?

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-2026-23318?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-23318 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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