CVE-2026-46157
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
A vulnerability has been identified in the Linux kernel related to concurrent access to the runtime.oss.trigger field in ALSA, which may lead to a data race. This issue can result in overwriting other bit fields, causing confusion in operations.
Risk Assessment
Concurrent access to this field without proper protection may lead to serious stability issues, threatening data integrity and the functioning of applications relying on ALSA.
Recommendation
It is recommended to update the Linux kernel to the latest version where security fixes have been implemented to block concurrent access to the runtime.oss.trigger field.
Original NVD description (English source)
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().