CVE-2026-64050 drm/msm/dpu: don't mix devm and drmm functions
A use-after-free vulnerability in the Linux kernel MSM DPU driver allows attackers to cause denial of service or execute code via improper memory management during device teardown.
- 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-2026-64050?
CVE-2026-64050 is a high-severity use after free 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/dpu: don't mix devm and drmm functions
Mixing devm and drmm functions will result in a use-after-free on msm driver teardown if userspace keeps a reference on the drm device: The WB connector data will be destroyed because of the use of devm_kzalloc()), while the usersoace still can try interacting with the WB connector (which uses drmm_ functions).
Change dpu_writeback_init() to use drmm_.
Patchwork: https://patchwork.freedesktop.org/patch/722656/
Weakness: CWE-416
Which versions are affected by CVE-2026-64050?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-64050?
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-2026-64050 being exploited?
There is no known exploitation of CVE-2026-64050 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-64050, DEBIAN-CVE-2026-64050, GHSA-9858-6444-xrjw, UBUNTU-CVE-2026-64050.