Bug 2516401 (CVE-2026-72281)

Summary:	CVE-2026-72281 kernel: KVM: arm64: account pKVM reclaim against the VM mm
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) for arm64 architectures. This vulnerability involves an issue with memory accounting for protected guest faults. During the teardown process, the system may incorrectly manage long-term memory pins, potentially leading to resource management inconsistencies within the virtual machine's memory. This could affect system stability or resource availability.	Story Points:	---
Clone Of:		Environment:
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 2026-08-15 06:10:32 UTC

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

KVM: arm64: account pKVM reclaim against the VM mm

Protected guest faults charge long term pins to the VM's mm. Teardown
can run later from file release, where current->mm may be unrelated.

Drop the charge from kvm->mm instead.

Comment 1 gkamathe 2026-08-18 09:00:57 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081558-CVE-2026-72281-2da4@gregkh/T