Bug 2283396 (CVE-2021-47553)

Summary: CVE-2021-47553 kernel: sched/scs: Reset task stack state in bringup_cpu()
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, esandeen, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lzampier, mleitner, mmilgram, mstowell, nmurray, ptalbert, rkeshri, 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   
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Fixed In Version: kernel 5.10.83, kernel 5.15.6, kernel 5.16 Doc Type: If docs needed, set a value
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2283496    

Description ybuenos 2024-05-27 09:47:16 UTC 
In the Linux kernel, the following vulnerability has been resolved:

sched/scs: Reset task stack state in bringup_cpu()

The Linux kernel CVE team has assigned CVE-2021-47553 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024052442-CVE-2021-47553-1026@gregkh/T
Comment 2 Alex 2024-06-09 17:47:09 UTC 
The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47553 is: CHECK	Maybe valid. Check manually. with impact LOW (that is an approximation based on flags KASAN INIT WARNONLY LEAK  ; 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.