Bug 2257406 (CVE-2024-0340)

Summary:	CVE-2024-0340 kernel: Information disclosure in vhost/vhost.c:vhost_new_msg()
Product:	[Other] Security Response	Reporter:	Rohit Keshri <rkeshri>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	acaringi, allarkin, bhu, chwhite, cye, cyin, dbohanno, debarbos, dfreiber, drow, dvlasenk, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, kyoshida, ldoskova, lgoncalv, lzampier, mmilgram, mstowell, nmurray, ptalbert, rparrazo, rrobaina, rvrbovsk, rysulliv, scweaver, tglozar, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 6.4-rc6	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in vhost_new_msg in drivers/vhost/vhost.c in the Linux kernel, which does not properly initialize memory in messages passed between virtual guests and the host operating system in the vhost/vhost.c:vhost_new_msg() function. This issue can allow local privileged users to read some kernel memory contents when reading from the /dev/vhost-net device file.	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:	2258356
Bug Blocks:	2257401

Description Rohit Keshri 2024-01-09 11:59:37 UTC

A vulnerability was found in vhost_new_msg in drivers/vhost/vhost.c in the Linux kernel. This flaw does not properly initialize memory in messages passed between virtual guests and the host operating system in the vhost/vhost.c:vhost_new_msg() function. This can allow local privileged users to read some kernel memory contents when reading from  the /dev/vhost-net device file.

References:
https://lore.kernel.org/lkml/5kn47peabxjrptkqa6dwtyus35ahf4pcj4qm4pumse33kxqpjw@mec4se5relrc/T/

Comment 2 Rohit Keshri 2024-01-14 17:35:41 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2258356]

Comment 4 Justin M. Forbes 2024-01-15 19:21:51 UTC

This flaw was fixed in the 6.4 kernel rebases for Fedora.

Comment 6 errata-xmlrpc 2024-06-05 00:29:39 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:3618 https://access.redhat.com/errata/RHSA-2024:3618

Comment 7 errata-xmlrpc 2024-06-05 10:00:55 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:3627 https://access.redhat.com/errata/RHSA-2024:3627

Comment 8 errata-xmlrpc 2024-11-12 09:18:15 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:9315 https://access.redhat.com/errata/RHSA-2024:9315

Comment 9 errata-xmlrpc 2025-05-14 00:34:04 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2025:7526 https://access.redhat.com/errata/RHSA-2025:7526