Bug 2555089 (CVE-2026-98746)

Summary:	CVE-2026-98746 kernel: serial: ma35d1: Fix clock reference leak in ma35d1serial_probe()
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 ma35d1 serial driver. This flaw allows a local user to cause a Denial of Service (DoS) through resource exhaustion. The driver fails to release clock references during probe error handling or when the serial port is removed, causing kernel resources to leak upon repeated initialization failures or device unbinding.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
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Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-10-18 15:53:47 UTC

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

serial: ma35d1: Fix clock reference leak in ma35d1serial_probe()

of_clk_get() returns a clock with a reference that has to be released
with clk_put(). ma35d1serial_probe() never does that, so the reference
is leaked on the probe error paths and also when the port is removed.

Release it on the error paths and in ma35d1serial_remove().

Comment 1 Mauro Matteo Cascella 2026-10-23 03:01:07 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98746.mbox