Bug 2535411 (CVE-2026-89872)

Summary:	CVE-2026-89872 kernel: media: v4l2-fwnode: Fix fwnode leak in v4l2_fwnode_parse_link
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:	akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, 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 `v4l2-fwnode` media subsystem. A local attacker or a malicious application could exploit this by failing to properly release a `fwnode` reference in the `v4l2_fwnode_parse_link` function. This resource leak could lead to system instability or a denial of service (DoS), making the system unresponsive or unavailable.	Story Points:	---
Clone Of:		Environment:
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-09-16 12:53:16 UTC

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

media: v4l2-fwnode: Fix fwnode leak in v4l2_fwnode_parse_link

In v4l2_fwnode_parse_link(), the remote endpoint fwnode reference is
acquired using fwnode_graph_get_remote_endpoint(). This reference is
properly released in the error paths, but it is leaked on the success
path.

Add the missing fwnode_handle_put() before returning 0 to prevent the
reference leak.

[Sakari Ailus: Fix subject prefix and coding style a little.]

Comment 1 Mauro Matteo Cascella 2026-09-17 08:41:57 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89872.mbox