Bug 2492349 (CVE-2026-53087)

Summary:	CVE-2026-53087 kernel: net: bcmgenet: fix leaking free_bds
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
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 bcmgenet network driver. When the transmit (tx) queue is reclaimed, the driver incorrectly drops data frames without returning them to the pool of free buffer descriptors (bds). This oversight results in a resource leak, which can lead to resource exhaustion and potentially cause a denial of service (DoS) for network functionality.	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 2026-06-24 18:07:12 UTC

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

net: bcmgenet: fix leaking free_bds

While reclaiming the tx queue we fast forward the write pointer to
drop any data in flight. These dropped frames are not added back
to the pool of free bds. We also need to tell the netdev that we
are dropping said data.

Comment 1 Keith Grant 2026-06-25 19:23:39 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062408-CVE-2026-53087-ce72@gregkh/T