CVE-2025-39757: ALSA: usb-audio: Validate UAC3 cluster segment descriptors
Vulnerability summary
CVE-2025-39757 is a high (CVSS 7.1) Out-of-bounds Read vulnerability in debian debian_linux. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.5% of scored vulnerabilities.
Not severe (CVSS 7.1, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 60 · Related 41Timeline
- 11-09-2025PublishedVulnerability first disclosed.
- 11-06-2026Last modifiedVulnerability information updated.
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 metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS trend
Probability
0.18%
Chance of exploitation in the next 30 days
Percentile
8%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.18% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu144 products
- linuxAll versions (No fix recorded) | < 5.15.0-163.173 | < 6.8.0-100.100
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1097.104 | < 6.8.0-1046.49
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian2 products
- linux< 6.1.153-1 | < 6.12.43-1 | < 6.16.3-1
- debian_linuxEOL11.0
Linux2 products
- linux≥ 11785ef53228d23ec386f5fe4a34601536f0c891, < 799c06ad4c9c790c265e8b6b94947213f1fb389c | ≥ 11785ef53228d23ec386f5fe4a34601536f0c891, < 786571b10b1ae6d90e1242848ce78ee7e1d493c4 | ≥ 11785ef53228d23ec386f5fe4a34601536f0c891, < 275e37532e8ebe25e8a4069b2d9f955bfd202a46 | ≥ 11785ef53228d23ec386f5fe4a34601536f0c891, < 47ab3d820cb0a502bd0074f83bb3cf7ab5d79902 | ≥ 11785ef53228d23ec386f5fe4a34601536f0c891, < 1034719fdefd26caeec0a44a868bb5a412c2c1a5 | ≥ 11785ef53228d23ec386f5fe4a34601536f0c891, < ae17b3b5e753efc239421d186cd1ff06e5ac296e | ≥ 11785ef53228d23ec386f5fe4a34601536f0c891, < dfdcbcde5c20df878178245d4449feada7d5b201 | ≥ 11785ef53228d23ec386f5fe4a34601536f0c891, < 7ef3fd250f84494fb2f7871f357808edaa1fc6ce | ≥ 11785ef53228d23ec386f5fe4a34601536f0c891, < ecfd41166b72b67d3bdeb88d224ff445f6163869 | 4.19
- linux_kernel≥ 4.19, < 5.4.297 | ≥ 5.5, < 5.10.241 | ≥ 5.11, < 5.15.190 | ≥ 5.16, < 6.1.149 | ≥ 6.2, < 6.6.103 | ≥ 6.7, < 6.12.43 | ≥ 6.13, < 6.15.11 | ≥ 6.16, < 6.16.2 | 6.17:rc1
3 vendors · 148 products
