Bug 2516551 (CVE-2026-72494)

Summary:	CVE-2026-72494 kernel: RDMA/irdma: Replace waitqueue and flag with completion
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
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 RDMA/irdma driver. The driver utilized a waitqueue and a `request_done` flag for synchronization without adequate memory barriers. This oversight could lead to a race condition, potentially causing unpredictable system behavior or instability.	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 06:18:27 UTC

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

RDMA/irdma: Replace waitqueue and flag with completion

The driver previously used a waitqueue along with an explicit
request_done flag, but without proper barriers around request_done.

An earlier patch by Gui-Dong Han <hanguidong02> attempted
to fix this by adding the missing memory barriers. Rather than
adding the barriers, this patch replaces the waitqueue+flag with
a completion, which is designed for this exact purpose.

Comment 1 Keith Grant 2026-08-19 18:36:49 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081539-CVE-2026-72494-4d3e@gregkh/T