Bug 2267829 (CVE-2021-47106)

Summary: CVE-2021-47106 kernel: netfilter: nf_tables: fix use-after-free in nft_set_catchall_destroy()
Product: [Other] Security Response Reporter: Mauro Matteo Cascella <mcascell>
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   
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Fixed In Version: kernel 5.15.12, kernel 5.16 Doc Type: If docs needed, set a value
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Blocks: 2268181    

Description Mauro Matteo Cascella 2024-03-04 22:22:13 UTC 
In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_tables: fix use-after-free in nft_set_catchall_destroy()

The Linux kernel CVE team has assigned CVE-2021-47106 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024030445-CVE-2021-47106-fdff@gregkh/T
Comment 5 Alex 2024-06-09 15:18:00 UTC 
The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47106 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is approximation based on flags REMOTE READ KASAN NETFILTER UAF KERNEL_PANIC_PLUS_UAF  ; 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.