VYPR
← All advisories
Unrated severityCISA KEVNVD Advisory· Published Dec 24, 2024· Updated Jan 5, 2026

ALSA: usb-audio: Fix out of bounds reads when finding clock sources

CVE-2024-53150

Description

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

ALSA: usb-audio: Fix out of bounds reads when finding clock sources

The current USB-audio driver code doesn't check bLength of each descriptor at traversing for clock descriptors. That is, when a device provides a bogus descriptor with a shorter bLength, the driver might hit out-of-bounds reads.

For addressing it, this patch adds sanity checks to the validator functions for the clock descriptor traversal. When the descriptor length is shorter than expected, it's skipped in the loop.

For the clock source and clock multiplier descriptors, we can just check bLength against the sizeof() of each descriptor type. OTOH, the clock selector descriptor of UAC2 and UAC3 has an array of bNrInPins elements and two more fields at its tail, hence those have to be checked in addition to the sizeof() check.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

178

Patches

Vulnerability mechanics

References

8

News mentions

0

No linked articles in our index yet.