Bug 2460663 (CVE-2026-31492)

Summary:	CVE-2026-31492 kernel: RDMA/irdma: Initialize free_qp completion before using it
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
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the Linux kernel's RDMA (Remote Direct Memory Access) irdma driver. This vulnerability occurs when the `free_qp` completion is not properly initialized before being used during the cleanup process in `irdma_destroy_qp`, specifically if the `ib_copy_to_udata` function fails. An attacker could potentially trigger this uninitialized wait, leading to system instability or 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 2026-04-22 15:03:57 UTC

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

RDMA/irdma: Initialize free_qp completion before using it

In irdma_create_qp, if ib_copy_to_udata fails, it will call
irdma_destroy_qp to clean up which will attempt to wait on
the free_qp completion, which is not initialized yet. Fix this
by initializing the completion before the ib_copy_to_udata call.

Comment 1 Keith Grant 2026-04-22 19:04:17 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026042202-CVE-2026-31492-2f6c@gregkh/T