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CVE-2021-26356

Published: May 9, 2023Updated: Jan 28, 2025 Sources: CVE List NVDCWE-367
NVD MITRE
7.4CVSSHIGH
EPSS Score
0.4%
Top 68.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A TOCTOU in ASP bootloader may allow an attacker to tamper with the SPI ROM following data read to memory potentially resulting in S3 data corruption and information disclosure.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-367

Affected Products

Ryzen™ 3000 Series Desktop Processors “Matisse” AM4AMDHardware Firmware
AMD Ryzen™ 5000 Series Desktop Processors “Vermeer” AM4AMDHardware Firmware
3rd Gen AMD Ryzen™ Threadripper™ Processors “Castle Peak” HEDTAMDHardware Firmware
Ryzen™ Threadripper™ PRO Processors “Castle Peak” WSAMDHardware Firmware
Ryzen™ Threadripper™ PRO Processors “Chagall” WSAMDHardware Firmware
amdcommercialUSHardware Firmwareaka advanced micro devices
and 101 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001
amd.com
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001
amd.com

Timeline

Published
May 9, 2023
Last Updated
Jan 28, 2025

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