Bug 2461543 (CVE-2026-31651)

Summary:	CVE-2026-31651 kernel: mmc: vub300: fix NULL-deref on disconnect
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
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 mmc: vub300 driver. This vulnerability allows a local attacker to trigger a NULL-pointer dereference or use-after-free condition during device disconnection. Successful exploitation could lead to a system crash, resulting in a denial of service.	Story Points:	---
Clone Of:		Environment:
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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 2026-04-24 15:07:36 UTC

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

mmc: vub300: fix NULL-deref on disconnect

Make sure to deregister the controller before dropping the reference to
the driver data on disconnect to avoid NULL-pointer dereferences or
use-after-free.

Comment 1 Keith Grant 2026-04-24 21:55:17 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026042400-CVE-2026-31651-6fe7@gregkh/T