Bug 2274574 (CVE-2021-47212)

Summary:	CVE-2021-47212 kernel: net/mlx5: Update error handler for UCTX and UMEM
Product:	[Other] Security Response	Reporter:	Marco Benatto <mbenatto>
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, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.15.5, kernel 5.16	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in the Linux kernel, affecting the Mellanox MLX5 driver. This issue involves improper error handling in the UCTX (user context) and UMEM (user memory) operations. When the system executes a destroy command during a fast unload flow, it should return a success code (MLX5_CMD_STAT_OK), but in the affected versions, it incorrectly returned an error code (EIO), causing issues in releasing user memory and removing context in the system. This error handling flaw could lead to system instability during device removal or context destruction in the kernel's Infiniband stack.	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:	2274606

Description Marco Benatto 2024-04-11 19:20:47 UTC

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

net/mlx5: Update error handler for UCTX and UMEM

The Linux kernel CVE team has assigned CVE-2021-47212 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024041005-CVE-2021-47212-01d8@gregkh/T

Comment 2 Alex 2024-06-09 15:25:03 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47212 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is approximation based on flags REMOTE NETWORK  ; 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.