CVE-2025-38249ALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3()
- 7.1HighCVSS base score
- 0.19%Exploitation in 30 daysEPSS · top 91% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3() In snd_usb_get_audioformat_uac3(), the length value returned from snd_usb_ctl_msg() is used directly for memory allocation without validation. This length is controlled by the USB device. The allocated buffer is cast to a uac3_cluster_header_descriptor and its fields are accessed without verifying that the buffer is large enough. If the device returns a smaller than expected length, this leads to an out-of-bounds read. Add a length check to ensure the buffer is large enough for uac3_cluster_header_descriptor.
Timeline
ID reserved
By Linux
- 3 months later
· 3 months later
Published
- 16 months later
· 16 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.19% · top 91% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.
Affected products
- affected 9a2fe9b801f585baccf8352d82839dcd54b300cf – < 24ff7d465c4284529bbfa207757bffb6f44b6403
- affected 9a2fe9b801f585baccf8352d82839dcd54b300cf – < 2dc1c3edf67abd30c757f8054a5da61927cdda21
- affected 9a2fe9b801f585baccf8352d82839dcd54b300cf – < c3fb926abe90d86f5e3055e0035f04d9892a118b
- affected 9a2fe9b801f585baccf8352d82839dcd54b300cf – < 6eb211788e1370af52a245d4d7da35c374c7b401
- affected 9a2fe9b801f585baccf8352d82839dcd54b300cf – < 74fcb3852a2f579151ce80b9ed96cd916ba0d5d8
- affected 9a2fe9b801f585baccf8352d82839dcd54b300cf – < 0ee87c2814deb5e42921281116ac3abcb326880b
- affected 9a2fe9b801f585baccf8352d82839dcd54b300cf – < 11e740dc1a2c8590eb7074b5c4ab921bb6224c36
- affected 9a2fe9b801f585baccf8352d82839dcd54b300cf – < fb4e2a6e8f28a3c0ad382e363aeb9cd822007b8a
- affected 4.17
- unaffected < 4.17
- unaffected 5.4.296 – ≤ 5.4.*
- unaffected 5.10.240 – ≤ 5.10.*
- unaffected 5.15.187 – ≤ 5.15.*
- unaffected 6.1.143 – ≤ 6.1.*
- unaffected 6.6.96 – ≤ 6.6.*
- unaffected 6.12.36 – ≤ 6.12.*
- unaffected 6.15.5 – ≤ 6.15.*
- unaffected 6.16 – ≤ *
References
References10
- https://git.kernel.org/stable/c/24ff7d465c4284529bbfa207757bffb6f44b6403 (opens in a new tab)
- https://git.kernel.org/stable/c/2dc1c3edf67abd30c757f8054a5da61927cdda21 (opens in a new tab)
- https://git.kernel.org/stable/c/c3fb926abe90d86f5e3055e0035f04d9892a118b (opens in a new tab)
- https://git.kernel.org/stable/c/6eb211788e1370af52a245d4d7da35c374c7b401 (opens in a new tab)
- https://git.kernel.org/stable/c/74fcb3852a2f579151ce80b9ed96cd916ba0d5d8 (opens in a new tab)
- https://git.kernel.org/stable/c/0ee87c2814deb5e42921281116ac3abcb326880b (opens in a new tab)
- https://git.kernel.org/stable/c/11e740dc1a2c8590eb7074b5c4ab921bb6224c36 (opens in a new tab)
- https://git.kernel.org/stable/c/fb4e2a6e8f28a3c0ad382e363aeb9cd822007b8a (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-20812 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-38249)Record last updated .