Bug 2266497 (CVE-2021-46939)

Summary:	CVE-2021-46939 kernel: tracing: Restructure trace_clock_global() to never block
Product:	[Other] Security Response	Reporter:	Nick Tait <ntait>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	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, sukulkar, tglozar, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		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:
Embargoed:
Bug Depends On:	2266498
Bug Blocks:	2266459

Description Nick Tait 2024-02-27 23:39:14 UTC

In the Linux kernel, the following vulnerability has been resolved:

tracing: Restructure trace_clock_global() to never block

The Linux kernel CVE team has assigned CVE-2021-46939 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/20240227184057.2368370-4-gregkh@linuxfoundation.org/T/#u

Comment 1 Nick Tait 2024-02-27 23:39:52 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2266498]

Comment 6 Justin M. Forbes 2024-02-28 18:55:56 UTC

This was fixed for Fedora with the 5.12.3 stable kernel update.

Comment 8 Alex 2024-06-09 15:18:27 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-46939 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is approximation based on flags LOCK DEADLOCK TRACE  ; 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.

Comment 9 errata-xmlrpc 2024-08-08 04:40:28 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 10 errata-xmlrpc 2024-08-08 04:52:15 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