CVE-2025-38729: ALSA: usb-audio: Validate UAC3 power domain descriptors, too
Vulnerability summary
CVE-2025-38729 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in debian debian_linux. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.9% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 57 · Related 41Timeline
- 04-09-2025PublishedVulnerability first disclosed.
- 12-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Validate UAC3 power domain descriptors, too UAC3 power domain descriptors need to be verified with its variable bLength for avoiding the unexpected OOB accesses by malicious firmware, too.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.19%
Chance of exploitation in the next 30 days
Percentile
9%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.19% 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≥ 9a2fe9b801f585baccf8352d82839dcd54b300cf, < 1666207ba0a5973735ef010812536adde6174e81 | ≥ 9a2fe9b801f585baccf8352d82839dcd54b300cf, < ebc9e06b6ea978a20abf9b87d41afc51b2d745ac | ≥ 9a2fe9b801f585baccf8352d82839dcd54b300cf, < f03418bb9d542f44df78eec2eff4ac83c0a8ac0d | ≥ 9a2fe9b801f585baccf8352d82839dcd54b300cf, < 40714daf4d0448e1692c78563faf0ed0f9d9b5c7 | ≥ 9a2fe9b801f585baccf8352d82839dcd54b300cf, < 07c8d78dbb5e0ff8b23f7fd69cd1d4e2ba22b3dc | ≥ 9a2fe9b801f585baccf8352d82839dcd54b300cf, < cd08d390d15b204cac1d3174f5f149a20c52e61a | ≥ 9a2fe9b801f585baccf8352d82839dcd54b300cf, < 29b415ec09f5b9d1dfa2423b826725a8c8796b9a | ≥ 9a2fe9b801f585baccf8352d82839dcd54b300cf, < 452ad54f432675982cc0d6eb6c40a6c86ac61dbd | ≥ 9a2fe9b801f585baccf8352d82839dcd54b300cf, < d832ccbc301fbd9e5a1d691bdcf461cdb514595f | 4.17
- linux_kernel≥ 4.17, < 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
