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.

Known Exploited

🚨 Marked as known exploited on April 8th, 2025 (9 days ago).

Classification

CVE ID: CVE-2024-53150

CVSS Base Severity: HIGH

CVSS Base Score: 7.8

CVSS Vector:

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 5.08% (scored less or equal to compared to others)

EPSS Date: 2025-02-04 (when was this score calculated)

References

https://git.kernel.org/stable/c/a632bdcb359fd8145e86486ff8612da98e239acd
https://git.kernel.org/stable/c/45a92cbc88e4013bfed7fd2ccab3ade45f8e896b
https://git.kernel.org/stable/c/ab011f7439d9bbfd34fd3b9cef4b2d6d952c9bb9
https://git.kernel.org/stable/c/da13ade87a12dd58829278bc816a61bea06a56a9
https://git.kernel.org/stable/c/74cb86e1006c5437b1d90084d22018da30fddc77
https://git.kernel.org/stable/c/ea0fa76f61cf8e932d1d26e6193513230816e11d
https://git.kernel.org/stable/c/096bb5b43edf755bc4477e64004fa3a20539ec2f
https://git.kernel.org/stable/c/a3dd4d63eeb452cfb064a13862fb376ab108f6a6

Timeline