CVE-2026-46211 drm/msm/gem: fix error handling in msm_ioctl_gem_info_get_metadata()
A missing NULL check in the Linux kernel MSM DRM driver causes a null pointer dereference, leading to a system crash.
- 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-2026-46211?
CVE-2026-46211 is a medium-severity vulnerability in Linux kernel, published on 28 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/msm/gem: fix error handling in msm_ioctl_gem_info_get_metadata()
msm_ioctl_gem_info_get_metadata() always returns 0 regardless of errors. When copy_to_user() fails or the user buffer is too small, the error code stored in ret is ignored because the function unconditionally returns 0. This causes userspace to believe the ioctl succeeded when it did not.
Additionally, kmemdup() can return NULL on allocation failure, but the return value is not checked. This leads to a NULL pointer dereference in the subsequent copy_to_user() call.
Add the missing NULL check for kmemdup() and return ret instead of 0.
Note that the SET counterpart (msm_ioctl_gem_info_set_metadata) correctly returns ret.
Patchwork: https://patchwork.freedesktop.org/patch/714478/
Weakness: CWE-476
Which versions are affected by CVE-2026-46211?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-46211?
Apply the vendor's patch.
Is CVE-2026-46211 being exploited?
There is no known exploitation of CVE-2026-46211 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-46211, DEBIAN-CVE-2026-46211, GHSA-6wcw-jhw2-v4p6, ROOT-OS-UBUNTU-2404-CVE-2026-46211, UBUNTU-CVE-2026-46211.