CVE-2026-98066 ALSA: caiaq: Fix potential double-free at error path
A double-free vulnerability in the Linux kernel ALSA caiaq driver allows local attackers to cause denial of service or potentially escalate privileges.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-98066?
CVE-2026-98066 is an use after free vulnerability in Linux, published on 25 Sep 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: caiaq: Fix potential double-free at error path
The fix for caiaq driver's resource management to handle the errors tries to release the resources in a common destructor call, but as a sashiko review for another patch suggested, some of the audio resources such as URBs have been already freed, and this may lead to a double-free.
For addressing the double-free, call the common destructor function from each place, and assure that the resource pointers get cleared.
Which versions are affected by CVE-2026-98066?
How do I fix CVE-2026-98066?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-98066 being exploited?
There is no known exploitation of CVE-2026-98066 in the wild and no public exploit code.
Sources
Also known as AZL-104322, BELL-CVE-2026-98066, DEBIAN-CVE-2026-98066, GHSA-m4v8-qp6h-hh9w, UBUNTU-CVE-2026-98066.