Bug 2266894 (CVE-2021-46991)

Summary: CVE-2021-46991 kernel: i40e: Fix use-after-free in i40e_client_subtask()
Product: [Other] Security Response Reporter: Avinash Hanwate <ahanwate>
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, jforbes, 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   
Fixed In Version: kernel 4.19.191, kernel 5.4.120, kernel 5.10.38, kernel 5.11.22, kernel 5.12.5, kernel 5.13 Doc Type: If docs needed, set a value
Doc Text:
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:
Bug Depends On: 2266895    
Bug Blocks: 2266939    

Description Avinash Hanwate 2024-02-29 08:21:42 UTC
In the Linux kernel, the following vulnerability has been resolved:

i40e: Fix use-after-free in i40e_client_subtask()

The Linux kernel CVE team has assigned CVE-2021-46991 to this issue.

Upstream advisory:

Comment 1 Avinash Hanwate 2024-02-29 08:22:19 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2266895]

Comment 5 Justin M. Forbes 2024-03-01 21:29:48 UTC
This was fixed for Fedora with the 5.12.5 stable kernel updates.

Comment 6 Alex 2024-06-09 15:14:48 UTC
The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-46991 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is approximation based on flags REMOTE READ SIMPLEFIX UAF 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.