CVE-2026-43104 drm/vc4: Fix a memory leak in hang state error path
A memory leak in the Linux kernel's vc4 DRM driver allows attackers to exhaust system memory, potentially 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-2026-43104?
CVE-2026-43104 is a medium-severity denial of service vulnerability in Linux kernel, published on 6 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/vc4: Fix a memory leak in hang state error path
When vc4_save_hang_state() encounters an early return condition, it returns without freeing the previously allocated `kernel_state`, leaking memory.
Add the missing kfree() calls by consolidating the early return paths into a single place.
Weakness: CWE-401
Which versions are affected by CVE-2026-43104?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-43104?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-43104 being exploited?
There is no known exploitation of CVE-2026-43104 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-43104, DEBIAN-CVE-2026-43104, GHSA-585p-9mg2-6vmm, ROOT-OS-DEBIAN-11-CVE-2026-43104, ROOT-OS-DEBIAN-12-CVE-2026-43104, ROOT-OS-UBUNTU-2204-CVE-2026-43104 and 2 more.