Bug 2282328 (CVE-2021-47408)

Summary: CVE-2021-47408 kernel: netfilter: conntrack: serialize hash resizes and cleanups
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, rparrazo, rrobaina, rvrbovsk, rysulliv, scweaver, sidakwo, sukulkar, tglozar, trathi, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: kernel 5.10.71, kernel 5.14.10, kernel 5.15 Doc Type: If docs needed, set a value
Doc Text:
A vulnerability was found in the Linux kernel’s netfilter and conntrack module, occurring during the resizing and cleanup of hash tables used for connection tracking. The kernel's nf_ct_iterate_cleanup() function fails to efficiently handle simultaneous hash resizes and cleanups, leading to prolonged delays lead to unresponsive system behavior.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2282371    

Description ybuenos 2024-05-22 08:32:51 UTC 
In the Linux kernel, the following vulnerability has been resolved:

netfilter: conntrack: serialize hash resizes and cleanups

The Linux kernel CVE team has assigned CVE-2021-47408 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024052151-CVE-2021-47408-ad88@gregkh/T
Comment 4 errata-xmlrpc 2024-08-08 04:43:47 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:5102 https://access.redhat.com/errata/RHSA-2024:5102
Comment 5 errata-xmlrpc 2024-08-08 04:55:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:5101 https://access.redhat.com/errata/RHSA-2024:5101