CVE-2026-43126: ALSA: mixer: oss: Add card disconnect checkpoints
In the Linux kernel, the following vulnerability has been resolved:
ALSA: mixer: oss: Add card disconnect checkpoints
ALSA OSS mixer layer calls the kcontrol ops rather individually, and pending calls might be not always caught at disconnecting the device.
For avoiding the potential UAF scenarios, add sanity checks of the card disconnection at each entry point of OSS mixer accesses. The rwsem is taken just before that check, hence the rest context should be covered by that properly.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-43126?
CVE-2026-43126 has a severity rating of high with a CVSS score of 7.8.
How do I fix CVE-2026-43126?
To fix CVE-2026-43126, you should apply the available patch from the Linux kernel.
What systems are affected by CVE-2026-43126?
CVE-2026-43126 affects the Linux kernel and specifically the ALSA OSS mixer layer.
What type of vulnerability is CVE-2026-43126?
CVE-2026-43126 is categorized as a potential use-after-free (UAF) vulnerability.
When was CVE-2026-43126 published?
CVE-2026-43126 was published on May 6, 2026.