CVE-2026-31781 drm/ioc32: stop speculation on the drm_compat_ioctl path
Attackers can exploit speculative execution flaws in the Linux kernel DRM compat ioctl path to potentially leak sensitive memory contents.
- 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-2026-31781?
CVE-2026-31781 is a medium-severity vulnerability in Linux kernel, published on 1 May 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/ioc32: stop speculation on the drm_compat_ioctl path
The drm compat ioctl path takes a user controlled pointer, and then dereferences it into a table of function pointers, the signature method of spectre problems. Fix this up by calling array_index_nospec() on the index to the function pointer list.
Which versions are affected by CVE-2026-31781?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-31781?
Apply the vendor's patch.
Is CVE-2026-31781 being exploited?
There is no known exploitation of CVE-2026-31781 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-31781, DEBIAN-CVE-2026-31781, GHSA-qq7p-hhwh-9jp5, ROOT-OS-DEBIAN-11-CVE-2026-31781, ROOT-OS-UBUNTU-2204-CVE-2026-31781, ROOT-OS-UBUNTU-2404-CVE-2026-31781 and 1 more.