CVE-2025-39757
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-11

Last updated on: 2025-11-03

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Validate UAC3 cluster segment descriptors UAC3 class segment descriptors need to be verified whether their sizes match with the declared lengths and whether they fit with the allocated buffer sizes, too. Otherwise malicious firmware may lead to the unexpected OOB accesses.
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Meta Information
Published
2025-09-11
Last Modified
2025-11-03
Generated
2026-06-16
AI Q&A
2025-09-11
EPSS Evaluated
2026-06-14
NVD
CVE-2025-39757
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
linux linux_kernel 5.10.244
linux linux_kernel 6.1.153
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability involves the Linux kernel's ALSA usb-audio driver, specifically in the handling of UAC3 (USB Audio Class 3) cluster segment descriptors. The issue is that these descriptors were not properly validated to ensure their sizes matched the declared lengths and fit within allocated buffer sizes. This lack of validation could allow malicious firmware to cause unexpected out-of-bounds (OOB) memory accesses.

Impact Analysis

The vulnerability can lead to unexpected out-of-bounds memory accesses caused by malicious firmware exploiting the improper validation of UAC3 cluster segment descriptors. This could potentially result in system instability, crashes, or allow an attacker to execute arbitrary code or cause denial of service on affected systems.

Mitigation Strategies

To mitigate this vulnerability, update the Linux kernel to a version that includes the fix for validating UAC3 cluster segment descriptors in the ALSA usb-audio driver. This ensures that the sizes of UAC3 class segment descriptors are properly verified to prevent out-of-bounds accesses caused by malicious firmware.

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