Bug 2174765 (CVE-2022-27672)

Summary:	CVE-2022-27672 kernel: AMD: Cross-Thread Return Address Predictions
Product:	[Other] Security Response	Reporter:	Alex <allarkin>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, allarkin, bhu, chwhite, crwood, dbohanno, ddepaula, debarbos, dfreiber, dhoward, dvlasenk, ezulian, fhrbata, hkrzesin, jarod, jburrell, jdenham, jfaracco, jferlan, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, kernel-mgr, ldoskova, lgoncalv, lleshchi, lzampier, nmurray, ptalbert, qzhao, rogbas, rrobaina, rvrbovsk, rysulliv, scweaver, tyberry, vkumar, walters, wcosta, williams, wmealing, ycote
Target Milestone:	---	Keywords:	Reopened, Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in HW. When SMT is enabled, certain AMD processors may speculatively execute instructions using a target from the sibling thread after an SMT mode switch, potentially resulting in information disclosure.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-03-02 16:17:10 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:	2174769, 2233080, 2233081, 2233082, 2233083
Bug Blocks:	2170028

Description Alex 2023-03-02 12:26:24 UTC

A flaw was found in HW. When SMT is enabled, certain AMD processors may speculatively execute instructions using a target from the sibling thread after an SMT mode switch potentially resulting in information disclosure.

References:
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1045
https://www.openwall.com/lists/oss-security/2023/02/14/4
https://xenbits.xen.org/xsa/advisory-426.html
https://kernel.org/doc/html//next/admin-guide/hw-vuln/cross-thread-rsb.html

Comment 3 Product Security DevOps Team 2023-03-02 16:17:07 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-2022-27672

Comment 11 errata-xmlrpc 2023-11-21 10:25:04 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Extended Update Support

Via RHSA-2023:7379 https://access.redhat.com/errata/RHSA-2023:7379

Comment 12 errata-xmlrpc 2023-11-21 11:24:40 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Extended Update Support

Via RHSA-2023:7370 https://access.redhat.com/errata/RHSA-2023:7370