Bug 2128462 (CVE-2022-40768)

Summary:	CVE-2022-40768 kernel: leak of sensitive information due to uninitialized data in stex_queuecommand_lck() in drivers/scsi/stex.c
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, adscvr, airlied, alciregi, bhu, brdeoliv, bskeggs, chwhite, crwood, ddepaula, debarbos, dhoward, dvlasenk, ezulian, fhrbata, hdegoede, hkrzesin, hpa, jarod, jarodwilson, jburrell, jfaracco, jferlan, jforbes, jglisse, jlelli, joe.lawrence, jonathan, josef, jshortt, jstancek, jwboyer, jwyatt, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, lleshchi, lzampier, masami256, mchehab, nmurray, ptalbert, qzhao, rvrbovsk, scweaver, steved, tyberry, vkumar, walters, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	An information disclosure vulnerability is found in stex_queuecommand_lck() in drivers/scsi/stex.c in the Linux Kernel. This flaw allows a local attacker to disclose sensitive information such as kernel space address.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-11-29 06:29:20 UTC	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:	2128463
Bug Blocks:	2128464

Description Guilherme de Almeida Suckevicz 2022-09-20 16:48:32 UTC

drivers/scsi/stex.c in the Linux kernel through 5.19.9 allows local users to obtain sensitive information from kernel memory because stex_queuecommand_lck lacks a memset for the PASSTHRU_CMD case.

References:
https://www.openwall.com/lists/oss-security/2022/09/09/1
https://www.openwall.com/lists/oss-security/2022/09/19/1

Upstream patch:
https://lore.kernel.org/all/20220908145154.2284098-1-gregkh@linuxfoundation.org/

Comment 1 Guilherme de Almeida Suckevicz 2022-09-20 16:48:59 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2128463]

Comment 4 Product Security DevOps Team 2022-11-29 06:29:17 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2022-40768