CVE-2026-89599 fbdev: omapfb: panel-dsi-cm: initialize lock before registering display
A race condition in the Linux kernel omapfb driver allows a crash when a display callback accesses an uninitialized mutex.
- 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-2026-89599?
CVE-2026-89599 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: omapfb: panel-dsi-cm: initialize lock before registering display
dsicm_probe() registers the display before initializing ddata->lock. Once omapdss_register_display() publishes the display, another consumer can reach a dsicm callback that takes this mutex while it is still uninitialized.
Initialize the mutex before registering the display so the published callbacks always see a valid lock.
Which versions are affected by CVE-2026-89599?
How do I fix CVE-2026-89599?
Apply the vendor's patch.
Is CVE-2026-89599 being exploited?
There is no known exploitation of CVE-2026-89599 in the wild and no public exploit code.
Sources
Also known as AZL-100139, BELL-CVE-2026-89599, DEBIAN-CVE-2026-89599, GHSA-vq32-rv69-wv5x, UBUNTU-CVE-2026-89599.