Bug 2516667 (CVE-2026-68468)

Summary:	CVE-2026-68468 kernel: mtd: virt-concat: free duplicate generated name
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
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Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the `mtd: virt-concat` component of the Linux kernel. When a virtual concatenated device is already registered, the `mtd_virt_concat_create_join()` function generates a duplicate name but fails to free the newly allocated string. This oversight leads to a memory leak, which could potentially result in resource exhaustion and a Denial of Service (DoS) condition on the system.	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 2026-08-15 06:24:49 UTC

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

mtd: virt-concat: free duplicate generated name

Every MTD registration runs mtd_virt_concat_create_join().  Once a
virtual concat has already been registered, the function builds the same
name again and takes the equal-name branch.  That branch skips to the
next item without freeing the newly allocated string.

Free the temporary name before continuing.

Comment 1 Keith Grant 2026-08-17 14:00:40 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081504-CVE-2026-68468-5a81@gregkh/T