Bug 2164382 (CVE-2021-46795)

Summary: CVE-2021-46795 hw: amd: TOCTOU (time-of-check to time-of-use) vulnerability cause memory out of bound results in a denial of service
Product: [Other] Security Response Reporter: Rohit Keshri <rkeshri>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: acaringi, bhu, chwhite, crwood, ddepaula, debarbos, dfreiber, dhoward, dvlasenk, ezulian, fhrbata, hkrzesin, jarod, jburrell, jfaracco, jferlan, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, kernel-mgr, lgoncalv, lleshchi, lzampier, nmurray, ptalbert, qzhao, rogbas, rvrbovsk, scweaver, tyberry, vkumar, walters, williams
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A Time-of-check to time-of-use (TOCTOU) vulnerability exists in hw. This flaw allows an attacker to use a compromised BIOS to cause the trusted execution environment (TEE) operating system to read memory out-of-bounds, potentially resulting in a denial of service.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2023-01-27 23:22:14 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:    
Bug Blocks: 2160446    

Description Rohit Keshri 2023-01-25 12:16:26 UTC 
A TOCTOU (time-of-check to time-of-use) vulnerability exists where an attacker may use a compromised BIOS to cause the TEE OS to read memory out of bounds that could potentially result in a denial of service.

Reference:
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1031
Comment 1 Rohit Keshri 2023-01-25 12:49:06 UTC 
Affected Products:
------------------
AMD Athlon™ Processors
AMD Ryzen™ Processors
AMD Threadripper™ Processors
Comment 4 Product Security DevOps Team 2023-01-27 23:22:11 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-2021-46795