Bug 2432365 (CVE-2025-71155)

Summary:	CVE-2025-71155 kernel: KVM: s390: Fix gmap_helper_zap_one_page() again
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
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 2026-01-23 15:02:43 UTC

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

KVM: s390: Fix gmap_helper_zap_one_page() again

A few checks were missing in gmap_helper_zap_one_page(), which can lead
to memory corruption in the guest under specific circumstances.

Add the missing checks.

Comment 1 Keith Grant 2026-01-23 18:29:36 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026012306-CVE-2025-71155-7691@gregkh/T