CVE-2026-43212 LoongArch: Make cpumask_of_node() robust against NUMA_NO_NODE
A missing check for NUMA_NO_NODE in the LoongArch architecture code can cause a null pointer dereference, leading to a system crash.
- 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-2026-43212?
CVE-2026-43212 is a high-severity 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:
LoongArch: Make cpumask_of_node() robust against NUMA_NO_NODE
The arch definition of cpumask_of_node() cannot handle NUMA_NO_NODE - which is a valid index - so add a check for this.
Which versions are affected by CVE-2026-43212?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-43212?
Apply the vendor's patch.
Is CVE-2026-43212 being exploited?
There is no known exploitation of CVE-2026-43212 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-43212, DEBIAN-CVE-2026-43212, GHSA-c859-65q3-j346, ROOT-OS-DEBIAN-11-CVE-2026-43212, ROOT-OS-UBUNTU-2204-CVE-2026-43212, ROOT-OS-UBUNTU-2404-CVE-2026-43212 and 1 more.