CVE WatchOct 15, 2026

CVE-2026-23318

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Use correct version for UAC3 header validation The en

CVSS

7.1

High

EPSS

0.1%

KEV

—

Exploit Today

0-100

Published: Mar 25, 2026 · Last modified: Oct 15, 2026 · CWE-125

EPSS · 30d

0.1%EPSS · 30 days0.1%

2026-09-302026-10-27

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.

Official references

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