Bug 2467084 (CVE-2026-43248)

Summary:	CVE-2026-43248 kernel: vhost: move vdpa group bound check to vhost_vdpa
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
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 vhost subsystem. Specifically, a bug in the `vdpa_sim` component allows for an out-of-bounds write when a valid ASID (Address Space ID) is incorrectly assigned to a vDPA (virtio Data Path Acceleration) group. This could lead to memory corruption, potentially resulting in a denial of service or other system instability.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-06 13:03:24 UTC

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

vhost: move vdpa group bound check to vhost_vdpa

Remove duplication by consolidating these here.  This reduces the
posibility of a parent driver missing them.

While we're at it, fix a bug in vdpa_sim where a valid ASID can be
assigned to a group equal to ngroups, causing an out of bound write.

Comment 1 Keith Grant 2026-05-06 23:05:31 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050602-CVE-2026-43248-7506@gregkh/T