Bug 2536478 (CVE-2026-90288)

Summary:	CVE-2026-90288 kernel: phy: renesas: rcar-gen2: Fix double of_node_put on phy creation failure
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
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 Renesas R-Car Gen2 PHY driver within the Linux kernel. This vulnerability occurs due to a double call to `of_node_put()` during the PHY creation failure path. A local attacker could potentially exploit this double free condition, leading to memory corruption and a denial of service.	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 2026-09-17 18:08:34 UTC

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

phy: renesas: rcar-gen2: Fix double of_node_put on phy creation failure

for_each_child_of_node_scoped() releases the node reference on scope
exit, so the explicit of_node_put(np) in the devm_phy_create() error
path drops it twice.

Drop the redundant of_node_put() and let the scoped cleanup handle it.

Comment 1 gkamathe 2026-09-22 18:23:10 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90288.mbox