CVE-2026-43212
LoongArch Kernel cpumask_of_node() NUMA_NO_NODE Handling Flaw
Publication date: 2026-05-06
Last updated on: 2026-05-06
Assigner: kernel.org
Description
Description
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux_kernel | linux_kernel | * |
| linux | linux_kernel | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in the Linux kernel's LoongArch architecture implementation. The function cpumask_of_node() does not properly handle the special index NUMA_NO_NODE, which is a valid index representing no NUMA node. Because of this, the function can behave incorrectly when encountering NUMA_NO_NODE. The vulnerability was fixed by adding a check to handle NUMA_NO_NODE correctly.
How can this vulnerability impact me? :
This vulnerability relates to the Linux kernel's handling of the cpumask_of_node() function on the LoongArch architecture. Specifically, the function was not robust against the NUMA_NO_NODE value, which is a valid index. This could potentially lead to incorrect behavior or system instability when the kernel processes CPU masks for nodes.
The impact could include system crashes, unexpected behavior in CPU scheduling or resource allocation, or other reliability issues on affected systems using the LoongArch architecture.