CVE-2026-64049 drm/msm/adreno: fix userspace-triggered crash on a2xx-a4xx
A local attacker can trigger a kernel crash in the Adreno GPU driver by querying unsupported UBWC parameters, causing a denial of service.
- 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-2026-64049?
CVE-2026-64049 is a medium-severity vulnerability in Linux kernel, published on 19 Jul 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/adreno: fix userspace-triggered crash on a2xx-a4xx
Before a5xx Adreno driver will not try fetching UBWC params (because those generations didn't support UBWC anyway), however it's still possible to query UBWC-related params from the userspace, triggering possible NULL pointer dereference. Check for UBWC config in adreno_get_param() and return sane defaults if there is none.
Patchwork: https://patchwork.freedesktop.org/patch/717778/
Weakness: CWE-476
Which versions are affected by CVE-2026-64049?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-64049?
Apply the vendor's patch.
Is CVE-2026-64049 being exploited?
There is no known exploitation of CVE-2026-64049 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-64049, DEBIAN-CVE-2026-64049, GHSA-x7cr-4cjx-m6cx, UBUNTU-CVE-2026-64049.