Bug 2282408 (CVE-2021-47346)

Summary:	CVE-2021-47346 kernel: coresight: tmc-etf: Fix global-out-of-bounds in tmc_update_etf_buffer()
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, 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 4.19.198, kernel 5.4.133, kernel 5.10.51, kernel 5.12.18, kernel 5.13.3, kernel 5.14	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in the Linux kernel's CoreSight driver, where the tmc_update_etf_buffer function accessed memory beyond the intended limits. This issue occurred because the function read more data than allocated, potentially causing system instability 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:	2282499

Description ybuenos 2024-05-22 11:18:11 UTC

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

coresight: tmc-etf: Fix global-out-of-bounds in tmc_update_etf_buffer()

The Linux kernel CVE team has assigned CVE-2021-47346 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024052139-CVE-2021-47346-dcfa@gregkh/T

Comment 2 Alex 2024-06-09 15:37:16 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47346 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is approximation based on flags READ KASAN OOB IMPROVEONLY  ; 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.