Bug 2300707 (CVE-2024-42093)

Summary:	CVE-2024-42093 kernel: net/dpaa2: Avoid explicit cpumask var allocation on stack
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:	dfreiber, drow, jburrell, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.4.279, kernel 5.10.221, kernel 5.15.162, kernel 6.1.97, kernel 6.6.37, kernel 6.9.8, kernel 6.10	Doc Type:	If docs needed, set a value
Doc Text:	A potential stack overflow flaw was found in the Linux kernel’s DPAA2 ethernet driver. This flaw allows a local user to crash or potentially escalate their privileges 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:
Bug Depends On:	2301748, 2307210
Bug Blocks:

Description OSIDB Bzimport 2024-07-29 18:20:42 UTC

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

net/dpaa2: Avoid explicit cpumask var allocation on stack

For CONFIG_CPUMASK_OFFSTACK=y kernel, explicit allocation of cpumask
variable on stack is not recommended since it can cause potential stack
overflow.

Instead, kernel code should always use *cpumask_var API(s) to allocate
cpumask var in config-neutral way, leaving allocation strategy to
CONFIG_CPUMASK_OFFSTACK.

Use *cpumask_var API(s) to address it.

Comment 1 Mauro Matteo Cascella 2024-07-30 17:40:09 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024072910-CVE-2024-42093-9646@gregkh/T

Comment 2 Mauro Matteo Cascella 2024-07-30 17:40:33 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2301748]