CVE-2026-80523 clk: spacemit: k3: set hdma clock as critical
A missing critical clock flag in the Spacemit K3 HDMA driver allows the clock to be disabled, causing the Linux system to hang during specific page faults.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-80523?
CVE-2026-80523 is a high-severity denial of service vulnerability in Linux, published on 26 Aug 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:
clk: spacemit: k3: set hdma clock as critical
HDMA clock is responsible for the internal TCM access path of X100 RISC-V core, so set the clock flag as critical to prevent it from being shut off, otherwise the Linux system will hang, for example in the case of a vector instruction access generates a page fault.
Which versions are affected by CVE-2026-80523?
How do I fix CVE-2026-80523?
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-2026-80523 being exploited?
There is no known exploitation of CVE-2026-80523 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-80523, GHSA-xwx3-g3pj-m9qw, UBUNTU-CVE-2026-80523.