Bug 2267505 (CVE-2024-26621)

Summary:	CVE-2024-26621 kernel: mm: huge_memory: don't force huge page alignment on 32 bit
Product:	[Other] Security Response	Reporter:	ybuenos
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, allarkin, aquini, aubaker, 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, rogbas, 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:		Doc Type:	If docs needed, set a value
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2267506
Bug Blocks:	2267686

Description ybuenos 2024-03-03 08:17:23 UTC

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

mm: huge_memory: don&#39;t force huge page alignment on 32 bit

The Linux kernel CVE team has assigned CVE-2024-26621 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024030255-CVE-2024-26621-9300@gregkh/T/#u

Comment 1 ybuenos 2024-03-03 08:18:13 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2267506]

Comment 5 Justin M. Forbes 2024-03-04 20:53:19 UTC

This was fixed for Fedora with the 6.7.6 stable kernel updates.

Comment 6 Audra Mitchell 2024-03-12 21:02:15 UTC

This does not impact RHEL8 or RHEL9 at this time as we do not have this code in our kernel. The issue was not introduced until v6.7 which we have not pulled into RHEL8 or RHEL9...

As an aside, we do have these two patch which introduces the same code- but also removes it at the same time- so we can disregard:
eebc80b8a167 Revert "mm: align larger anonymous mappings on THP boundaries"
c97e82038959 mm: align larger anonymous mappings on THP boundaries

Closing the triaging jiras accordingly...