CVE-2026-46157 ALSA: pcm: oss: Fix data race at accessing runtime.oss.trigger
A data race in the Linux kernel ALSA OSS module can corrupt bit fields, potentially causing system instability or denial of service.
- 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-2026-46157?
CVE-2026-46157 is a high-severity vulnerability in Linux kernel, published on 28 May 2026. 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: pcm: oss: Fix data race at accessing runtime.oss.trigger
Currently the runtime.oss.trigger field may be accessed concurrently without protection, which may lead to the data race. And, in this case, it may lead to more severe problem because it's a bit field; as writing the data, it may overwrite other bit fields as well, which confuses the operation completely, as spotted by fuzzing.
Fix it by covering runtime.oss.trigger bit fled also with the existing params_lock mutex in both snd_pcm_oss_get_trigger() and snd_pcm_oss_poll().
Weakness: CWE-362
Which versions are affected by CVE-2026-46157?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-46157?
Apply the vendor's patch.
Is CVE-2026-46157 being exploited?
There is no known exploitation of CVE-2026-46157 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-46157, DEBIAN-CVE-2026-46157, GHSA-27pv-w59x-hr4j, ROOT-OS-DEBIAN-11-CVE-2026-46157, ROOT-OS-DEBIAN-12-CVE-2026-46157, ROOT-OS-UBUNTU-2204-CVE-2026-46157 and 2 more.