Bug 2282422 (CVE-2021-47338)

Summary:	CVE-2021-47338 kernel: fbmem: Do not delete the mode that is still in use
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 5.4.134, kernel 5.10.52, kernel 5.12.19, kernel 5.13.4, kernel 5.14	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in the Linux kernel's fbmem subsystem. This issue arises when the system attempts to delete a video mode that is still in use, leading to potential use-after-free errors. This improper handling can result in system crashes or undefined behavior when accessing freed memory.	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:	2282499

Description ybuenos 2024-05-22 11:34:08 UTC

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

fbmem: Do not delete the mode that is still in use

The Linux kernel CVE team has assigned CVE-2021-47338 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024052137-CVE-2021-47338-cd10@gregkh/T

Comment 4 Alex 2024-06-09 17:10:06 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47338 is: CHECK	Maybe valid. Check manually. with impact LOW (that is an approximation based on flags READ KASAN UAF  ; 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 126 errata-xmlrpc 2024-09-24 00:36:27 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:7001 https://access.redhat.com/errata/RHSA-2024:7001

Comment 127 errata-xmlrpc 2024-09-24 02:30:50 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:7000 https://access.redhat.com/errata/RHSA-2024:7000