Bug 2282423 (CVE-2021-47337)

Summary: CVE-2021-47337 kernel: scsi: core: Fix bad pointer dereference when ehandler kthread is invalid
Product: [Other] Security Response Reporter: ybuenos
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: acaringi, allarkin, aquini, bhu, chwhite, cye, cyin, dbohanno, debarbos, dfreiber, drow, dvlasenk, emilne, 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, 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 4.9.276, kernel 4.14.240, kernel 4.19.198, 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 SCSI subsystem. The issue occurs when the system tries to stop an error handler thread that failed to start; if the thread fails to spawn, the kernel may dereference a bad pointer, leading to potential system crash.
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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 11:37:19 UTC 
In the Linux kernel, the following vulnerability has been resolved:

scsi: core: Fix bad pointer dereference when ehandler kthread is invalid

The Linux kernel CVE team has assigned CVE-2021-47337 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024052136-CVE-2021-47337-4863@gregkh/T
Comment 4 Alex 2024-06-09 15:34:51 UTC 
The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47337 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is approximation based on flags DANGER NULLPTR 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.