SB20260529137 - Race condition in Linux kernel core oss

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-46157)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a data race in the ALSA pcm oss subsystem when accessing the runtime.oss.trigger field concurrently. A local user can trigger concurrent access to confuse operation and cause a denial of service.

The issue involves a bit field, so concurrent writes may overwrite other bit fields as well.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/49f9d048845be874df7997e4b1ce662de450c4b6
• https://git.kernel.org/stable/c/6b01c1bc9a4748ab37548a700a8aaff910e298e6
• https://git.kernel.org/stable/c/901ac0ff15edf9503162e2cf6579bd11a30f1ed4
• https://git.kernel.org/stable/c/ac3e9b55b7da6f0be51720bd330a0edc1a8b61f1