What’s Vulnerable › Vulnerabilities

CVE-2025-39757: ALSA: usb-audio: Validate UAC3 cluster segment descriptors

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-11 · updated 2026-10-19
• Weakness: CWE-125

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.

Affected products

• Debian Linux: 11.0
• Linux kernel: from 4.19 before 5.4.297; from 5.5 before 5.10.241; from 5.11 before 5.15.190; from 5.16 before 6.1.149; from 6.2 before 6.6.103; from 6.7 before 6.12.43 — fixed in 5.10.241, 5.15.190, 5.4.297, 6.1.149, 6.12.43, 6.15.11

How to fix

Upgrade to a fixed version: Linux kernel 5.10.241, 5.15.190, 5.4.297, 6.1.149. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1034719fdefd26caeec0a44a868bb5a412c2c1a5
• https://git.kernel.org/stable/c/275e37532e8ebe25e8a4069b2d9f955bfd202a46
• https://git.kernel.org/stable/c/47ab3d820cb0a502bd0074f83bb3cf7ab5d79902
• https://git.kernel.org/stable/c/786571b10b1ae6d90e1242848ce78ee7e1d493c4
• https://git.kernel.org/stable/c/799c06ad4c9c790c265e8b6b94947213f1fb389c
• https://git.kernel.org/stable/c/7ef3fd250f84494fb2f7871f357808edaa1fc6ce
• https://git.kernel.org/stable/c/ae17b3b5e753efc239421d186cd1ff06e5ac296e
• https://git.kernel.org/stable/c/dfdcbcde5c20df878178245d4449feada7d5b201
• https://git.kernel.org/stable/c/ecfd41166b72b67d3bdeb88d224ff445f6163869
• https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
• https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
• https://cert-portal.siemens.com/productcert/html/ssa-032379.html

Get alerted when CVE-2025-39757 or the next vulnerability affects your stack