CVE-2024-57893 ALSA: seq: oss: Fix races at processing SysEx messages
A race condition in the Linux kernel ALSA OSS sequencer allows out-of-bounds access during SysEx message processing, potentially leading to privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-57893?
CVE-2024-57893 is a high-severity vulnerability in Linux kernel, published on 15 Jan 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-362
Which versions are affected by CVE-2024-57893?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-57893?
Apply the vendor's patch.
Is CVE-2024-57893 being exploited?
There is no known exploitation of CVE-2024-57893 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-67839, BELL-CVE-2024-57893, DEBIAN-CVE-2024-57893, GHSA-pr7g-498h-frwf, ROOT-OS-DEBIAN-11-CVE-2024-57893, ROOT-OS-UBUNTU-2204-CVE-2024-57893 and 1 more.