CVE-2025-37891
HIGH EPSS 10.7%
Published May 19, 20251y ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
Published May 19, 2025 1y ago
Last Modified Jun 17, 2026 2w ago
Description
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
10.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available
Weaknesses 1
CWE-120
Affected Products 7
References 4
- git.kernel.org https://git.kernel.org/stable/c/226beac5605afbb33f8782148d188b64396145a4
- git.kernel.org https://git.kernel.org/stable/c/42ef48dd4ebb082a1a90b5c3feeda2e68a9e32fe
- git.kernel.org https://git.kernel.org/stable/c/56f1f30e6795b890463d9b20b11e576adf5a2f77
- git.kernel.org https://git.kernel.org/stable/c/ce4f77bef276e7d2eb7ab03a5d08bcbaa40710ec
Remediation
- git.kernel.org https://git.kernel.org/stable/c/226beac5605afbb33f8782148d188b64396145a4
- git.kernel.org https://git.kernel.org/stable/c/42ef48dd4ebb082a1a90b5c3feeda2e68a9e32fe
- git.kernel.org https://git.kernel.org/stable/c/56f1f30e6795b890463d9b20b11e576adf5a2f77
- git.kernel.org https://git.kernel.org/stable/c/ce4f77bef276e7d2eb7ab03a5d08bcbaa40710ec