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CVE-2021-26316

Published: Jan 10, 2023Updated: Apr 9, 2025 Sources: CVE List NVD BDUCWE-20
7.8HIGH
NVD MITRE
EPSS Score
0.3%
Top 82.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

Failure to validate the communication buffer and communication service in the BIOS may allow an attacker to tamper with the buffer resulting in potential SMM (System Management Mode) arbitrary code execution.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-20

Affected Products

AMD
commercial·USaka advanced micro devices
Ryzen 5000 Series
Hardware Firmware
Ryzen 2000 Series
Hardware Firmware
Ryzen 3000 Series
Hardware Firmware
1st Gen EPYC
Hardware Firmware
2nd Gen EPYC
Hardware Firmware
3rd Gen EPYC
Hardware Firmware
epyc 7h12 firmware
Hardware Firmware
epyc 7f72 firmware
Hardware Firmware
Lenovo Group Limited
commercial·CNaka lenovo
SR635
Hardware Firmware
SR655
Hardware Firmware
SR645
Hardware Firmware
SR665
Hardware Firmware
Lenovo ThinkAgile HX3375
Hardware Firmware
Lenovo ThinkAgile HX3376
Hardware Firmware
Advanced Micro Devices Inc.
commercial·USaka amd
1st Gen AMD EPYC
Hardware Firmware
3rd Gen AMD EPYC
Hardware Firmware
2nd Gen AMD EPYC
Hardware Firmware
and 145 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2021-26316?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1031
amd.com
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032
amd.com
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1032
amd.com
and 1 more references View all →

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