Bug 2467153 (CVE-2026-43212)

Summary:	CVE-2026-43212 kernel: LoongArch: Make cpumask_of_node() robust against NUMA_NO_NODE
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in the Linux kernel, specifically within the `cpumask_of_node()` function on the LoongArch architecture. This function did not properly handle the `NUMA_NO_NODE` index, which is a valid input. This oversight could lead to unexpected system behavior or instability, potentially impacting resource management within the kernel.	Story Points:	---
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Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-06 13:07:16 UTC

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.

Comment 1 Keith Grant 2026-05-06 21:48:01 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050649-CVE-2026-43212-5cc5@gregkh/T