Answer in brief
CVE-2025-21835 records a Unknown severity vulnerability in usb: gadget: f_midi: fix MIDI Streaming descriptor lengths. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=c8933c3f79568263c90a46f06cf80419e6c63c97 <3a983390d14e8498f303fc5cb23ab7d696b815db || >=c8933c3f79568263c90a46f06cf80419e6c63c97 <9f36a89dcb78cb7e37f487b04a16396ac18c0636 || >=c8933c3f79568263c90a46f06cf80419e6c63c97 <d8e86700c8a8cf415e300a0921acd6a8f9b494f8 || >=c8933c3f79568263c90a46f06cf80419e6c63c97 <9f6860a9c11301b052225ca8825f8d2b1a5825bf || >=c8933c3f79568263c90a46f06cf80419e6c63c97 <6ae6dee9f005a2f3b739b85abb6f14a0935699e0 || >=c8933c3f79568263c90a46f06cf80419e6c63c97 <6b16761a928796e4b49e89a0b1ac284155172726 || >=c8933c3f79568263c90a46f06cf80419e6c63c97 <a2d0694e1f111379c1efdf439dadd3cfd959fe9d || >=c8933c3f79568263c90a46f06cf80419e6c63c97 <da1668997052ed1cb00322e1f3b63702615c9429 | 3a983390d14e8498f303fc5cb23ab7d696b815db, 9f36a89dcb78cb7e37f487b04a16396ac18c0636, d8e86700c8a8cf415e300a0921acd6a8f9b494f8, 9f6860a9c11301b052225ca8825f8d2b1a5825bf, 6ae6dee9f005a2f3b739b85abb6f14a0935699e0, 6b16761a928796e4b49e89a0b1ac284155172726, a2d0694e1f111379c1efdf439dadd3cfd959fe9d, da1668997052ed1cb00322e1f3b63702615c9429 |
| Linux/Linuxgeneric | 3.2 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Mar 7, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.