CVE-2026-89883 media: rc: sunxi-cir: Unregister rc device on probe failure
A resource leak in the sunxi-cir driver allows denial of service if device registration succeeds but subsequent probe steps fail.
- 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-2026-89883?
CVE-2026-89883 is a high-severity denial of service vulnerability in Linux, published on 16 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:
media: rc: sunxi-cir: Unregister rc device on probe failure
After rc_register_device() succeeds, later probe failures must undo the registration with rc_unregister_device(). The current error path jumps to the allocation cleanup label and only calls rc_free_device(), leaving the rc device registration and resources created by rc_register_device() behind.
Add a registered-device unwind label for the IRQ lookup, IRQ request, and hardware initialization failure paths. Keep rc_free_device() for failures before rc_register_device() succeeds.
Which versions are affected by CVE-2026-89883?
How do I fix CVE-2026-89883?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-89883 being exploited?
There is no known exploitation of CVE-2026-89883 in the wild and no public exploit code.
Sources
Also known as AZL-101582, BELL-CVE-2026-89883, DEBIAN-CVE-2026-89883, GHSA-53fc-6cww-57mr, UBUNTU-CVE-2026-89883.