Bug 2245711 (CVE-2023-45898)

Summary:	CVE-2023-45898 kernel: use-after-free in fs/ext4/extents_status.c
Product:	[Other] Security Response	Reporter:	Marco Benatto <mbenatto>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	acaringi, allarkin, bhu, chwhite, cye, cyin, dbohanno, debarbos, dfreiber, dvlasenk, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jforbes, jlelli, joe.lawrence, jpoimboe, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, mstowell, nmurray, ptalbert, rogbas, rparrazo, rrobaina, rvrbovsk, scweaver, tglozar, 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:	A use-after-free flaw was found in the EXT4 file system, related to ext4_es_insert_extent, in the Linux Kernel. This issue may allow an attacker to create a crafted EXT4 file system which will trigger the vulnerability and lead the kernel to PANIC, causing a denial of service on the targeted system.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
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Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2245937
Bug Blocks:	2245709

Description Marco Benatto 2023-10-23 17:55:43 UTC

The Linux kernel before 6.5.4 has an es1 use-after-free in fs/ext4/extents_status.c, related to ext4_es_insert_extent.

https://github.com/torvalds/linux/commit/768d612f79822d30a1e7d132a4d4b05337ce42ec
https://lore.kernel.org/lkml/aa03f191-445c-0d2e-d6d7-0a3208d7df7a@huawei.com/T/
https://www.spinics.net/lists/stable-commits/msg317086.html
https://lkml.org/lkml/2023/8/13/477
https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.4

Comment 3 Alex 2023-10-24 16:29:38 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2245937]

Comment 4 Justin M. Forbes 2023-10-24 17:32:57 UTC

This was fixed for Fedora with the 6.5.4 stable kernel update.