Actively exploited in the wild
Linux Kernel Out-of-Bounds Read Vulnerability
Linux - Kernel · Listed in the CISA KEV since 2025-04-09. This indicates confirmed attacks in production environments.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CVE-2024-53150
HighCVSS 7.1KEVSummary
In the Linux kernel, the ALSA USB-audio driver did not check the bLength of each clock descriptor while traversing them, so a device providing a bogus descriptor with a shorter bLength could cause out-of-bounds reads. The fix adds sanity checks to the clock descriptor traversal validators, including extra checks for the UAC2 and UAC3 clock selector descriptor.
Risk Assessment
Plugging in a malicious or faulty USB audio device can trigger out-of-bounds memory reads, potentially causing a kernel crash (denial of service) and possibly enabling further exploitation.
Recommendation
Update the Linux kernel to a version containing the fix and avoid connecting untrusted USB audio devices to critical systems.
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Original NVD description (English source)
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.