Bug 2283431 (CVE-2021-47520)

Summary:	CVE-2021-47520 kernel: can: pch_can: pch_can_rx_normal: fix use after free
Product:	[Other] Security Response	Reporter:	ybuenos
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, allarkin, aquini, bhu, chwhite, cye, cyin, dbohanno, debarbos, dfreiber, drow, dvlasenk, esandeen, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lzampier, mbenatto, mleitner, mmilgram, mstowell, nmurray, ptalbert, rparrazo, rrobaina, rvrbovsk, rysulliv, scweaver, sidakwo, sukulkar, tglozar, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 4.4.295, kernel 4.9.293, kernel 4.14.258, kernel 4.19.221, kernel 5.4.165, kernel 5.10.85, kernel 5.15.8, kernel 5.16	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in the Linux kernel in the function pch_can_rx_normal() where the improper ordering of function calls can lead to a use-after-free scenario when the function dereferences the skb (socket buffer) object after calling the function netif_receive_skb(), which could have altered or freed skb. This vulnerability could lead to memory corruption or crashes.	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:
Bug Blocks:	2283494

Description ybuenos 2024-05-27 10:36:24 UTC

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

can: pch_can: pch_can_rx_normal: fix use after free

The Linux kernel CVE team has assigned CVE-2021-47520 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024052433-CVE-2021-47520-af45@gregkh/T

Comment 2 Alex 2024-06-09 14:36:48 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47520 is: 	SKIP	No affected files built, so skip this CVE	NO			-	-	unknown	 (where first YES/NO value means if related sources built).