CVE-2021-46795

MEDIUM
4.7
CVSS Score
Published: January 10, 2023 at 08:53 PM UTC
Updated: June 17, 2026 at 04:15 AM UTC
7 products affected across 1 vendorCOMBOAM4V2 Pi FirmwareCezannepi FP6 FirmwareRenoirpi FP6 Firmware

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Severity
MEDIUM4.7
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.0.0.6
Affected range stops below 1.0.0.6, so it looks safe — our inference, not a vendor statement
amd-cezannepi-fp6 (same device)
v < 1.2.0.5
Affected range stops below 1.2.0.5, so it looks safe — our inference, not a vendor statement
amd-comboam4v2-pi (same device)
v < 1.0.0.7
Affected range stops below 1.0.0.7, so it looks safe — our inference, not a vendor statement
amd-comboam4v2-pi (environment)
All versions
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.7MEDIUMCISA-ADP
Attack Vector
LOCAL
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-367

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