Bug 2301503 (CVE-2024-42138)

Summary:	CVE-2024-42138 kernel: mlxsw: core_linecards: Fix double memory deallocation in case of invalid INI file
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:	dfreiber, drow, jburrell, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 6.1.98, kernel 6.6.39, kernel 6.9.9, kernel 6.10	Doc Type:	If docs needed, set a value
Doc Text:	A double memory deallocation flaw was found in mlxsw_linecard_types_init()in the Linux kernel. This issue occurs because pointer is not set to NULL, which may lead to compromised availability.	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:
Bug Depends On:	2301996
Bug Blocks:

Description OSIDB Bzimport 2024-07-30 08:37:08 UTC

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

mlxsw: core_linecards: Fix double memory deallocation in case of invalid INI file

In case of invalid INI file mlxsw_linecard_types_init() deallocates memory
but doesn't reset pointer to NULL and returns 0. In case of any error
occurred after mlxsw_linecard_types_init() call, mlxsw_linecards_init()
calls mlxsw_linecard_types_fini() which performs memory deallocation again.

Add pointer reset to NULL.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Comment 1 Mauro Matteo Cascella 2024-07-31 10:17:50 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024073029-CVE-2024-42138-afe8@gregkh/T

Comment 2 Mauro Matteo Cascella 2024-07-31 10:18:12 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2301996]