Bug 2278285 (CVE-2024-27007)

Summary:	CVE-2024-27007 kernel: userfaultfd: change src_folio after ensuring it's unpinned in UFFDIO_MOVE
Product:	[Other] Security Response	Reporter:	Zack Miele <zmiele>
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, dbohanno, debarbos, dfreiber, drow, dvlasenk, esandeen, ezulian, hkrzesin, jarod, jburrell, jfaracco, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, ldoskova, lgoncalv, mleitner, mmilgram, mstowell, nmurray, ptalbert, rhel-process-autobot, rparrazo, rrobaina, rvrbovsk, scweaver, sidakwo, sukulkar, tglozar, vkumar, watson-tool-maintainers, wcosta, williams, wmealing, ycote, ykopkova
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 6.8.8, kernel 6.9-rc5	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the Linux kernel's userfaultfd component, specifically in the handling of huge pages during the UFFDIO_MOVE operation. A local attacker could exploit improper management of memory pages, which could lead to memory corruption. This could result in a system crash or other unpredictable behavior, potentially leading to a Denial of Service (DoS) or further compromise.	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:	2278286
Bug Blocks:	2278552

Description Zack Miele 2024-05-01 18:46:43 UTC

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

userfaultfd: change src_folio after ensuring it&#39;s unpinned in UFFDIO_MOVE

The Linux kernel CVE team has assigned CVE-2024-27007 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024050147-CVE-2024-27007-686b@gregkh/T

Comment 1 Zack Miele 2024-05-01 18:47:15 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2278286]

Comment 2 Alex 2024-06-09 12:53:57 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2024-27007 is: 	SKIP	The Fixes patch not applied yet, so unlikely that actual: adef440691bab824e39c1b17382322d195e1fab0	YES			NO	NO	unknown (where first YES/NO value means if related sources built).