CVE-2026-89597 fbdev: uvesafb: unregister connector callback on init failure
A resource leak in the uvesafb driver occurs if platform driver registration fails, leaving a connector callback registered.
- 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-2026-89597?
CVE-2026-89597 is a high-severity vulnerability in Linux, published on 11 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:
fbdev: uvesafb: unregister connector callback on init failure
uvesafb_init() registers the v86d connector callback before registering the platform driver. If platform_driver_register() fails, the function returns the error directly and leaves the connector callback registered.
The later platform-device failure path already unregisters the callback. Add the same cleanup before the final return when platform-driver registration fails.
This issue was identified during our ongoing static-analysis research while reviewing kernel code.
Which versions are affected by CVE-2026-89597?
How do I fix CVE-2026-89597?
Apply the vendor's patch.
Is CVE-2026-89597 being exploited?
There is no known exploitation of CVE-2026-89597 in the wild and no public exploit code.
Sources
Also known as AZL-100824, BELL-CVE-2026-89597, DEBIAN-CVE-2026-89597, GHSA-4qm2-vqpp-wwm8, UBUNTU-CVE-2026-89597.