High severity · published Sep 11, 2025
CVE-2025-39757
ALSA: usb-audio: Validate UAC3 cluster segment descriptors
7.1
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
4.19 before 5.4.297; 5.5 before 5.10.241; 5.11 before 5.15.190; 5.16 before 6.1.149; 6.2 before 6.6.103; 6.7 before 6.12.43; +3 more · source: NVD
LI
Linux · Linux
11785ef53228d23ec386f5fe4a34601536f0c891 before 799c06ad4c9c790c265e8b6b94947213f1fb389c; 11785ef53228d23ec386f5fe4a34601536f0c891 before 786571b10b1ae6d90e1242848ce78ee7e1d493c4; 11785ef53228d23ec386f5fe4a34601536f0c891 before 275e37532e8ebe25e8a4069b2d9f955bfd202a46; 11785ef53228d23ec386f5fe4a34601536f0c891 before 47ab3d820cb0a502bd0074f83bb3cf7ab5d79902; 11785ef53228d23ec386f5fe4a34601536f0c891 before 1034719fdefd26caeec0a44a868bb5a412c2c1a5; 11785ef53228d23ec386f5fe4a34601536f0c891 before ae17b3b5e753efc239421d186cd1ff06e5ac296e; +4 more · source: vendor
DL
Debian Linux · Debian
11.0 · source: NVD
SC
SIMATIC CN 4100 · Siemens
before V5.0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-39757
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-39757
Patch
https://git.kernel.org/stable/c/1034719fdefd26caeec0a44a868bb5a412c2c1a5
Patch
https://git.kernel.org/stable/c/275e37532e8ebe25e8a4069b2d9f955bfd202a46
Patch
https://git.kernel.org/stable/c/47ab3d820cb0a502bd0074f83bb3cf7ab5d79902
Patch
https://git.kernel.org/stable/c/786571b10b1ae6d90e1242848ce78ee7e1d493c4
Patch
https://git.kernel.org/stable/c/799c06ad4c9c790c265e8b6b94947213f1fb389c
Patch
https://git.kernel.org/stable/c/7ef3fd250f84494fb2f7871f357808edaa1fc6ce
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