Bug 2396395 (CVE-2022-50391)

Summary:	CVE-2022-50391 kernel: mm/mempolicy: fix memory leak in set_mempolicy_home_node system call
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Description OSIDB Bzimport 2025-09-18 14:02:36 UTC

In the Linux kernel, the following vulnerability has been resolved:

mm/mempolicy: fix memory leak in set_mempolicy_home_node system call

When encountering any vma in the range with policy other than MPOL_BIND or
MPOL_PREFERRED_MANY, an error is returned without issuing a mpol_put on
the policy just allocated with mpol_dup().

This allows arbitrary users to leak kernel memory.

Comment 1 Keith Grant 2025-09-18 15:34:53 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091853-CVE-2022-50391-7caa@gregkh/T