Bug 2282464 (CVE-2021-47316)

Summary: CVE-2021-47316 kernel: nfsd: fix NULL dereference in nfs3svc_encode_getaclres
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, 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 5.13.4, kernel 5.14 Doc Type: If docs needed, set a value
Doc Text:
A vulnerability was found in the nfs3svc_encode_getaclres function in the Linux kernel's NFS server, where the function may encounter a NULL pointer for a directory entry (dentry), which can lead to a system crash or instability when accessed improperly.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2282500    

Description ybuenos 2024-05-22 12:10:56 UTC 
In the Linux kernel, the following vulnerability has been resolved:

nfsd: fix NULL dereference in nfs3svc_encode_getaclres

The Linux kernel CVE team has assigned CVE-2021-47316 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024052130-CVE-2021-47316-e2c2@gregkh/T
Comment 3 Alex 2024-06-09 15:38:00 UTC 
The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47316 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is approximation based on flags NULLPTR DISK SIMPLEFIX  ; 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.