Bug 2283457 (CVE-2021-47572)

Summary:	CVE-2021-47572 kernel: net: nexthop: fix null pointer dereference when IPv6 is not enabled
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, mleitner, mmilgram, mstowell, nmurray, ptalbert, rparrazo, rrobaina, rvrbovsk, rysulliv, scweaver, sidakwo, sukulkar, tglozar, trathi, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.4.163, kernel 5.10.83, kernel 5.15.6, kernel 5.16	Doc Type:	If docs needed, set a value
Doc Text:		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:	2283496

Description ybuenos 2024-05-27 11:11:41 UTC

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

net: nexthop: fix null pointer dereference when IPv6 is not enabled

The Linux kernel CVE team has assigned CVE-2021-47572 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024052454-CVE-2021-47572-50bc@gregkh/T

Comment 1 Alex 2024-06-09 17:52:38 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47572 is: CHECK	Maybe valid. Check manually. with impact LOW (that is an approximation based on flags REMOTE DANGER NULLPTR ERRORPATH NETWORK  ; these flags parsed automatically based on patch data). Such automatic check happens only for Low/Moderates (and only when not from reporter, but parsing already existing CVE). Highs always checked manually (I check it myself and then we check it again in Remediation team). In rare cases some of the Moderates could be increased to High later.

Comment 4 Keith Grant 2025-01-22 13:36:29 UTC

The fixes for this flaw were included in RHEL 9.1 GA, see https://access.redhat.com/errata/RHSA-2022:8267