Bug 2482060 (CVE-2026-46038)

Summary:	CVE-2026-46038 kernel: net: qrtr: ns: Free the node during ctrl_cmd_bye()
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 `qrtr` nameserver component. When a node sends a BYE packet, the nameserver fails to free the associated node memory, leading to a memory leak. This vulnerability can result in resource exhaustion over time, potentially impacting system stability and availability.	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 2026-05-27 15:09:24 UTC

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

net: qrtr: ns: Free the node during ctrl_cmd_bye()

A node sends the BYE packet when it is about to go down. So the nameserver
should advertise the removal of the node to all remote and local observers
and free the node finally. But currently, the nameserver doesn't free the
node memory even after processing the BYE packet. This causes the node
memory to leak.

Hence, remove the node from Xarray list and free the node memory during
both success and failure case of ctrl_cmd_bye().

Comment 1 Keith Grant 2026-05-27 19:48:03 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052750-CVE-2026-46038-ec0d@gregkh/T