Bug 2271480 (CVE-2021-47142)

Summary:	CVE-2021-47142 kernel: drm/amdgpu: Fix a use-after-free
Product:	[Other] Security Response	Reporter:	Mauro Matteo Cascella <mcascell>
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, ndegraef, 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 4.4.271, kernel 4.9.271, kernel 4.14.235, kernel 4.19.193, kernel 5.4.124, kernel 5.10.42, kernel 5.12.9, kernel 5.13	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in DRM (Direct Rendering Manager) AMDGPU driver of Linux Kernel, where an use-after-free occurred due to the failure to properly set ttm->sg to NULL, leads to a panic scenario causing potential memory corruption.	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:	2271565

Description Mauro Matteo Cascella 2024-03-25 17:50:19 UTC

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

drm/amdgpu: Fix a use-after-free

The Linux kernel CVE team has assigned CVE-2021-47142 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024032558-CVE-2021-47142-9319@gregkh/T

Comment 2 Alex 2024-06-09 15:09:14 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47142 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is approximation based on flags DANGER UAF  ; these flags parsed automatically based on patche 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.