CVE-2026-90297 drm/sun4i: crtc: Propagate layer initialization error
A null pointer dereference in the sun4i DRM driver causes a kernel oops when layer initialization fails, leading to denial of service.
- 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-2026-90297?
CVE-2026-90297 is a vulnerability in Linux, published on 17 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:
drm/sun4i: crtc: Propagate layer initialization error
sun4i_crtc_init() returns plain NULL when layer initialization fails, while all its other error paths return an error pointer. The only caller, sun4i_tcon_bind(), checks the result with IS_ERR() and happily continues with tcon->crtc set to NULL. sun4i_rgb_init() and sun4i_lvds_init() then dereference it in drm_crtc_mask(), which oopses.
Return the error pointer instead.
Which versions are affected by CVE-2026-90297?
How do I fix CVE-2026-90297?
Apply the vendor's patch.
Is CVE-2026-90297 being exploited?
There is no known exploitation of CVE-2026-90297 in the wild and no public exploit code.
Sources
Also known as AZL-102332, BELL-CVE-2026-90297, DEBIAN-CVE-2026-90297, GHSA-m975-xmq3-6qch, UBUNTU-CVE-2026-90297.