Home/CVE/Improper access controls in System Management Unit (SMU) may allow for an attacker to override performance control table
CVE

CVE-2021-26338

Improper access controls in System Management Unit (SMU) may allow for an attacker to override performance control table

Improper access controls in System Management Unit (SMU) may allow for an attacker to override performance control tables located in DRAM resulting in a potential lack of system resources.

HIGH · CVSS 7.5 EPSS 0.00473
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-284Improper Access Control
▤

Affected Products & Versions

44
amd epyc 7f72 firmware< romepi-sp3_1.0.0.c
amd epyc 7f52 firmware< romepi-sp3_1.0.0.c
amd epyc 7f32 firmware< romepi-sp3_1.0.0.c
amd epyc 7h12 firmware< romepi-sp3_1.0.0.c
amd epyc 7742 firmware< romepi-sp3_1.0.0.c
amd epyc 7702 firmware< romepi-sp3_1.0.0.c
amd epyc 7702p firmware< romepi-sp3_1.0.0.c
amd epyc 7662 firmware< romepi-sp3_1.0.0.c
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · psirt@amd.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD16 Nov 2021 · 06:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1021Vendor Advisory
Intelligence Graph · click any node to traverse
CVETechnique ActorTool Family
drag to reposition · click any node to traverse · button top-right enlarges
External lookups - second-class, for what we don’t hold ourselves
NVDCVE.orgCISAVulnersExploit-DBGitHub PoCVulnCheck KEVGreyNoise
Vulnerabilities
CISA KEV catalog
CWE weaknesses
CAPEC attack patterns
Package vulnerabilities
Threat intelligence
Threat actors
Tools & malware
ATT&CK techniques
IOCs
Detection & defense
Sigma rules
YARA rules
Atomic Red Team tests
D3FEND countermeasures
Compliance
NIST 800-53
ISO 27001:2022
SOC 2 TSC
PCI-DSS v4.0
CIS Controls v8.1
About
All capabilities
Live statistics
Data sources
Privacy policy
Terms of service
threatengine.sh  ·  Open-source threat intelligence platform  ·  100+ authoritative sources  ·  Every fact traces to its origin