Bug 2525442 (CVE-2026-80624)

Summary:	CVE-2026-80624 kernel: mfd: cs42l43: Sanity check firmware size
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
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the Linux kernel's `mfd: cs42l43` component. This vulnerability occurs because the system does not properly verify that the received firmware's size is larger than its header. An attacker could exploit this by providing a malformed firmware, leading to an out-of-bounds memory access. This could potentially result in system instability or other unpredictable behavior.	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 2026-08-28 07:45:12 UTC

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

mfd: cs42l43: Sanity check firmware size

Currently the code checks if a firmware was received, however it does
not verify that the firmware size is larger than the firmware header. As
the firmware pointer is dereferenced as a pointer to the header
structure this could lead to an out of bounds memory access. Add the
missing check.

Comment 1 gkamathe 2026-09-01 10:26:25 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026082837-CVE-2026-80624-0e64@gregkh/T