ALSA: seq: oss: Fix races at processing SysEx messages
In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: oss: Fix races at processing SysEx messages OSS sequencer handles the SysEx messages split in 6 bytes packets, and ALSA sequencer OSS layer tries to combine those. It stores the data in the internal buffer and this access is racy as of now, which may lead to the out-of-bounds access. As a temporary band-aid fix, introduce a mutex for serializing the process of the SysEx message packets.
02 / AFFECTED SOFTWARE
Affected packages
1043 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: oss: Fix races at processing SysEx messages OSS sequencer handles the SysEx messages split in 6 bytes packets, and ALSA sequencer OSS layer tries to combine those. It stores the data in the internal buffer and this access is racy as of now, which may lead to the out-of-bounds access. As a temporary band-aid fix, introduce a mutex for serializing the process of the SysEx message packets.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/0179488ca992d79908b8e26b9213f1554fc5bacc
- https://git.kernel.org/stable/c/9d382112b36382aa65aad765f189ebde9926c101
- https://git.kernel.org/stable/c/cff1de87ed14fc0f2332213d2367100e7ad0753a
- https://git.kernel.org/stable/c/d2392b79d8af3714ea8878b71c66dc49d3110f44
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/57xxx/CVE-2024-57893.json
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
- https://nvd.nist.gov/vuln/detail/CVE-2024-57893