Bug 2282484 (CVE-2021-47299)

Summary: CVE-2021-47299 kernel: xdp, net: Fix use-after-free in bpf_xdp_link_release
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   
Whiteboard:
Fixed In Version: kernel 5.10.54, kernel 5.13.6, kernel 5.14 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: 2282972    

Description ybuenos 2024-05-22 12:50:51 UTC 
In the Linux kernel, the following vulnerability has been resolved:

xdp, net: Fix use-after-free in bpf_xdp_link_release

The Linux kernel CVE team has assigned CVE-2021-47299 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024052125-CVE-2021-47299-e1d9@gregkh/T
Comment 3 Alex 2024-06-09 17:34:33 UTC 
The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47299 is: CHECK	Maybe valid. Check manually. with impact LOW (that is an approximation based on flags REMOTE READ KASAN BPF UAF  ; 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.