CVE-2025-21835usb: gadget: f_midi: fix MIDI Streaming descriptor lengths
- 5.5MediumCVSS base score
- 0.23%Exploitation in 30 daysEPSS · top 86% 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: usb: gadget: f_midi: fix MIDI Streaming descriptor lengths While the MIDI jacks are configured correctly, and the MIDIStreaming endpoint descriptors are filled with the correct information, bNumEmbMIDIJack and bLength are set incorrectly in these descriptors. This does not matter when the numbers of in and out ports are equal, but when they differ the host will receive broken descriptors with uninitialized stack memory leaking into the descriptor for whichever value is smaller. The precise meaning of "in" and "out" in the port counts is not clearly defined and can be confusing. But elsewhere the driver consistently uses this to match the USB meaning of IN and OUT viewed from the host, so that "in" ports send data to the host and "out" ports receive data from it.
Timeline
ID reserved
By Linux
- 2 months later
· 2 months later
Published
- 20 months later
· 20 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 · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.23% · top 86% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected c8933c3f79568263c90a46f06cf80419e6c63c97 – < 3a983390d14e8498f303fc5cb23ab7d696b815db
- affected c8933c3f79568263c90a46f06cf80419e6c63c97 – < 9f36a89dcb78cb7e37f487b04a16396ac18c0636
- affected c8933c3f79568263c90a46f06cf80419e6c63c97 – < d8e86700c8a8cf415e300a0921acd6a8f9b494f8
- affected c8933c3f79568263c90a46f06cf80419e6c63c97 – < 9f6860a9c11301b052225ca8825f8d2b1a5825bf
- affected c8933c3f79568263c90a46f06cf80419e6c63c97 – < 6ae6dee9f005a2f3b739b85abb6f14a0935699e0
- affected c8933c3f79568263c90a46f06cf80419e6c63c97 – < 6b16761a928796e4b49e89a0b1ac284155172726
- affected c8933c3f79568263c90a46f06cf80419e6c63c97 – < a2d0694e1f111379c1efdf439dadd3cfd959fe9d
- affected c8933c3f79568263c90a46f06cf80419e6c63c97 – < da1668997052ed1cb00322e1f3b63702615c9429
- affected 3.2
- unaffected < 3.2
- unaffected 5.4.291 – ≤ 5.4.*
- unaffected 5.10.235 – ≤ 5.10.*
- unaffected 5.15.179 – ≤ 5.15.*
- unaffected 6.1.129 – ≤ 6.1.*
- unaffected 6.6.79 – ≤ 6.6.*
- unaffected 6.12.16 – ≤ 6.12.*
- unaffected 6.13.4 – ≤ 6.13.*
- unaffected 6.14 – ≤ *
References
References12
- https://git.kernel.org/stable/c/3a983390d14e8498f303fc5cb23ab7d696b815db (opens in a new tab)
- https://git.kernel.org/stable/c/9f36a89dcb78cb7e37f487b04a16396ac18c0636 (opens in a new tab)
- https://git.kernel.org/stable/c/d8e86700c8a8cf415e300a0921acd6a8f9b494f8 (opens in a new tab)
- https://git.kernel.org/stable/c/9f6860a9c11301b052225ca8825f8d2b1a5825bf (opens in a new tab)
- https://git.kernel.org/stable/c/6ae6dee9f005a2f3b739b85abb6f14a0935699e0 (opens in a new tab)
- https://git.kernel.org/stable/c/6b16761a928796e4b49e89a0b1ac284155172726 (opens in a new tab)
- https://git.kernel.org/stable/c/a2d0694e1f111379c1efdf439dadd3cfd959fe9d (opens in a new tab)
- https://git.kernel.org/stable/c/da1668997052ed1cb00322e1f3b63702615c9429 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-784472.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-2025-6298 (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-2025-21835)Record last updated .