Bug 2516652 (CVE-2026-72241)

Summary:	CVE-2026-72241 kernel: leds: uleds: Fix potential buffer overread
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:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in the kernel. In the `leds: uleds` module, a buffer overread can occur because the name string provided by userspace is not guaranteed to be null-terminated. This can lead to a local attacker potentially reading sensitive information from adjacent memory or causing a denial of service.	Story Points:	---
Clone Of:		Environment:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-08-15 06:24:04 UTC

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

leds: uleds: Fix potential buffer overread

The name string supplied by userspace is not guaranteed to be
null-terminated, so using strchr() on it might result in a buffer
overread. The same thing will happen when said string is used by
the LED class device.

Fix this by using strnchr() instead and explicitly check that
the name string is properly null-terminated.

Comment 1 Keith Grant 2026-08-18 17:07:01 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081551-CVE-2026-72241-79ad@gregkh/T