Bug 2516519 (CVE-2026-72295)

Summary:	CVE-2026-72295 kernel: LoongArch: KVM: Validate irqchip index in irqfd routing
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
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Doc Text:	A flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) for LoongArch architecture. An unvalidated interrupt controller (irqchip) index in the irqfd routing mechanism could allow a local attacker to perform an out-of-bounds memory access. This could lead to a denial of service or potentially privilege escalation within the system.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-08-15 06:16:43 UTC

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

LoongArch: KVM: Validate irqchip index in irqfd routing

Sashiko reported that the irqchip index is not validated for LoongArch.
Add validation and reject out-of-range irqchip indexes to avoid indexing
past the routing table's chip array.

Comment 1 Keith Grant 2026-08-18 19:22:35 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081501-CVE-2026-72295-4e85@gregkh/T