Answer in brief
CVE-2025-37891 records a Unknown severity vulnerability in ALSA: ump: Fix buffer overflow at UMP SysEx message conversion. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0b5288f5fe63eab687c14e5940b9e0d532b129f2 <ce4f77bef276e7d2eb7ab03a5d08bcbaa40710ec || >=0b5288f5fe63eab687c14e5940b9e0d532b129f2 <226beac5605afbb33f8782148d188b64396145a4 || >=0b5288f5fe63eab687c14e5940b9e0d532b129f2 <42ef48dd4ebb082a1a90b5c3feeda2e68a9e32fe || >=0b5288f5fe63eab687c14e5940b9e0d532b129f2 <56f1f30e6795b890463d9b20b11e576adf5a2f77 | ce4f77bef276e7d2eb7ab03a5d08bcbaa40710ec, 226beac5605afbb33f8782148d188b64396145a4, 42ef48dd4ebb082a1a90b5c3feeda2e68a9e32fe, 56f1f30e6795b890463d9b20b11e576adf5a2f77 |
| Linux/Linuxgeneric | 6.5 | Not reported |
Published upstream
May 19, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: ALSA: ump: Fix buffer overflow at UMP SysEx message conversion The conversion function from MIDI 1.0 to UMP packet contains an internal buffer to keep the incoming MIDI bytes, and its size is 4, as it was supposed to be the max size for a MIDI1 UMP packet data. However, the implementation overlooked that SysEx is handled in a different format, and it can be up to 6 bytes, as found in do_convert_to_ump(). It leads eventually to a buffer overflow, and may corrupt the memory when a longer SysEx message is received. The fix is simply to extend the buffer size to 6 to fit with the SysEx UMP message.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2025-37891 records a Unknown severity vulnerability in ALSA: ump: Fix buffer overflow at UMP SysEx message conversion. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0b5288f5fe63eab687c14e5940b9e0d532b129f2 <ce4f77bef276e7d2eb7ab03a5d08bcbaa40710ec || >=0b5288f5fe63eab687c14e5940b9e0d532b129f2 <226beac5605afbb33f8782148d188b64396145a4 || >=0b5288f5fe63eab687c14e5940b9e0d532b129f2 <42ef48dd4ebb082a1a90b5c3feeda2e68a9e32fe || >=0b5288f5fe63eab687c14e5940b9e0d532b129f2 <56f1f30e6795b890463d9b20b11e576adf5a2f77 | ce4f77bef276e7d2eb7ab03a5d08bcbaa40710ec, 226beac5605afbb33f8782148d188b64396145a4, 42ef48dd4ebb082a1a90b5c3feeda2e68a9e32fe, 56f1f30e6795b890463d9b20b11e576adf5a2f77 |
| Linux/Linuxgeneric | 6.5 | Not reported |
Published upstream
May 19, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: ALSA: ump: Fix buffer overflow at UMP SysEx message conversion The conversion function from MIDI 1.0 to UMP packet contains an internal buffer to keep the incoming MIDI bytes, and its size is 4, as it was supposed to be the max size for a MIDI1 UMP packet data. However, the implementation overlooked that SysEx is handled in a different format, and it can be up to 6 bytes, as found in do_convert_to_ump(). It leads eventually to a buffer overflow, and may corrupt the memory when a longer SysEx message is received. The fix is simply to extend the buffer size to 6 to fit with the SysEx UMP message.
Quoted source text, attributed separately from HOL analysis.