Bug 2355455 (CVE-2023-52931)

Summary:	CVE-2023-52931 kernel: drm/i915: Avoid potential vm use-after-free
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:	dfreiber, drow, jburrell, rhel-process-autobot, vkumar, 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 `drm/i915` component of the Linux kernel. This vulnerability arises from a race condition where a virtual machine (VM) object is exposed to userspace before a necessary reference is acquired. A local attacker could exploit this timing issue to trigger a use-after-free error, potentially leading to a denial of service or privilege escalation.	Story Points:	---
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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 2025-03-27 17:02:22 UTC

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

drm/i915: Avoid potential vm use-after-free

Adding the vm to the vm_xa table makes it visible to userspace, which
could try to race with us to close the vm.  So we need to take our extra
reference before putting it in the table.

(cherry picked from commit 99343c46d4e2b34c285d3d5f68ff04274c2f9fb4)

Comment 1 Robb Gatica 2025-03-28 00:15:21 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025032719-CVE-2023-52931-593f@gregkh/T