CVE-2025-71121 parisc: Do not reprogram affinitiy on ASP chip
A flaw in the Linux kernel parisc architecture causes a system crash when attempting to reprogram affinity on specific old hardware.
- 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-2025-71121?
CVE-2025-71121 is a medium-severity denial of service vulnerability in Linux kernel, published on 14 Jan 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:
parisc: Do not reprogram affinitiy on ASP chip
The ASP chip is a very old variant of the GSP chip and is used e.g. in HP 730 workstations. When trying to reprogram the affinity it will crash with a HPMC as the relevant registers don't seem to be at the usual location. Let's avoid the crash by checking the sversion. Also note, that reprogramming isn't necessary either, as the HP730 is a just a single-CPU machine.
Which versions are affected by CVE-2025-71121?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-71121?
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-2025-71121 being exploited?
There is no known exploitation of CVE-2025-71121 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-71121, DEBIAN-CVE-2025-71121, GHSA-cvgw-6fq9-4498, ROOT-OS-DEBIAN-11-CVE-2025-71121, ROOT-OS-DEBIAN-12-CVE-2025-71121, ROOT-OS-DEBIAN-13-CVE-2025-71121 and 3 more.