Bug 2464456 (CVE-2026-31784)

Summary:	CVE-2026-31784 kernel: drm/xe/pxp: Clear restart flag in pxp_start after jumping back
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
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 drm/xe/pxp component. An issue exists where a restart flag in the pxp_start function is not properly cleared. This oversight can cause the function to continuously loop, potentially leading to a system hang or crash, resulting in a Denial of Service (DoS).	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 2026-05-01 15:07:48 UTC

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

drm/xe/pxp: Clear restart flag in pxp_start after jumping back

If we don't clear the flag we'll keep jumping back at the beginning of
the function once we reach the end.

(cherry picked from commit 0850ec7bb2459602351639dccf7a68a03c9d1ee0)

Comment 1 Keith Grant 2026-05-01 23:49:00 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050152-CVE-2026-31784-66d5@gregkh/T