CVE-2025-37891
Severity CVSS v4.0:
Pending analysis
Type:
CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Publication date:
19/05/2025
Last modified:
17/11/2025
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
ALSA: ump: Fix buffer overflow at UMP SysEx message conversion<br />
<br />
The conversion function from MIDI 1.0 to UMP packet contains an<br />
internal buffer to keep the incoming MIDI bytes, and its size is 4, as<br />
it was supposed to be the max size for a MIDI1 UMP packet data.<br />
However, the implementation overlooked that SysEx is handled in a<br />
different format, and it can be up to 6 bytes, as found in<br />
do_convert_to_ump(). It leads eventually to a buffer overflow, and<br />
may corrupt the memory when a longer SysEx message is received.<br />
<br />
The fix is simply to extend the buffer size to 6 to fit with the SysEx<br />
UMP message.
Impact
Base Score 3.x
7.80
Severity 3.x
HIGH
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.5 (including) | 6.6.90 (excluding) |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.7 (including) | 6.12.28 (excluding) |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.13 (including) | 6.14.6 (excluding) |
| cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page