Bug 2283463 (CVE-2021-47566)

Summary:	CVE-2021-47566 kernel: proc/vmcore: fix clearing user buffer by properly using clear_user()
Product:	[Other] Security Response	Reporter:	ybuenos
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
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, scweaver, sidakwo, sukulkar, tglozar, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 4.4.294, kernel 4.9.292, kernel 4.14.257, kernel 4.19.219, 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 11:18:59 UTC

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

proc/vmcore: fix clearing user buffer by properly using clear_user()

The Linux kernel CVE team has assigned CVE-2021-47566 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024052453-CVE-2021-47566-12b8@gregkh/T

Comment 2 Alex 2024-06-09 16:11:41 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47566 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is an approximation based on flags DANGER DISK IMPROVEONLY  ; 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 10 errata-xmlrpc 2024-08-13 14:33:52 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2024:5281 https://access.redhat.com/errata/RHSA-2024:5281

Comment 12 errata-xmlrpc 2024-09-24 01:14:08 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Extended Update Support

Via RHSA-2024:6993 https://access.redhat.com/errata/RHSA-2024:6993