Bug 2246980 (CVE-2023-46862)

Summary:	CVE-2023-46862 kernel: NULL pointer dereference vulnerability in io_uring_show_fdinfo
Product:	[Other] Security Response	Reporter:	Avinash Hanwate <ahanwate>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, allarkin, bhu, chwhite, cye, cyin, dbohanno, debarbos, dvlasenk, ezulian, hkrzesin, jarod, jdenham, jfaracco, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lzampier, mstowell, nmurray, ptalbert, rparrazo, rrobaina, rvrbovsk, rysulliv, scweaver, tglozar, tyberry, 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 null pointer dereference flaw was found in the Linux kernel's io_uring functionality. This issue could allow a local user to crash the system.	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:	2251043
Bug Blocks:	2249092

Description Avinash Hanwate 2023-10-30 10:11:00 UTC

An issue was discovered in the Linux kernel through 6.5.9. During a race with SQ thread exit, an io_uring/fdinfo.c io_uring_show_fdinfo NULL pointer dereference can occur.

https://github.com/torvalds/linux/commit/7644b1a1c9a7ae8ab99175989bfc8676055edb46
https://bugzilla.kernel.org/show_bug.cgi?id=218032#c4

Comment 3 Alex 2023-11-22 14:41:09 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2251043]

Comment 4 Justin M. Forbes 2023-11-22 16:33:48 UTC

This was fixed for Fedora with the 6.5.10 stable kernel updates.

Comment 6 errata-xmlrpc 2024-04-30 10:14:10 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:2394 https://access.redhat.com/errata/RHSA-2024:2394