CVE-2026-45956 drm/exynos: vidi: use priv->vidi_dev for ctx lookup in vidi_connection_ioctl()
A use-after-free vulnerability in the Exynos DRM driver allows attackers to cause crashes or potentially execute code via improper context lookup.
- 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-2026-45956?
CVE-2026-45956 is a high-severity use after free vulnerability in Linux kernel, published on 27 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/exynos: vidi: use priv->vidi_dev for ctx lookup in vidi_connection_ioctl()
vidi_connection_ioctl() retrieves the driver_data from drm_dev->dev to obtain a struct vidi_context pointer. However, drm_dev->dev is the exynos-drm master device, and the driver_data contained therein is not the vidi component device, but a completely different device.
This can lead to various bugs, ranging from null pointer dereferences and garbage value accesses to, in unlucky cases, out-of-bounds errors, use-after-free errors, and more.
To resolve this issue, we need to store/delete the vidi device pointer in exynos_drm_private->vidi_dev during bind/unbind, and then read this exynos_drm_private->vidi_dev within ioctl() to obtain the correct struct vidi_context pointer.
Weakness: CWE-416
Which versions are affected by CVE-2026-45956?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-45956?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-45956 being exploited?
There is no known exploitation of CVE-2026-45956 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-88539, BELL-CVE-2026-45956, DEBIAN-CVE-2026-45956, GHSA-pwfh-32f2-c83x, ROOT-OS-DEBIAN-11-CVE-2026-45956, ROOT-OS-DEBIAN-13-CVE-2026-45956 and 3 more.