Is CVE-2021-46795 in the CISA KEV catalog?

No. CVE-2021-46795 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-46795?

CVE-2021-46795 has a CVSS v3 base score of 4.7 (MEDIUM).

What is the EPSS score for CVE-2021-46795?

CVE-2021-46795 has an EPSS score of 0.14% (3th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-46795?

Upgrade cezannepi-fp6 firmware to 1.0.0.6 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2021-46795

MEDIUM

4.7

CVSS v3

NVD

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.

CWE-367TOCTOU Race Condition

How to fix

Remediation Available

cezannepi-fp6 firmwareNVD

Affected:< 1.0.0.6Fixed in:1.0.0.6CVE-2021-46795derived from NVD

comboam4v2 pi firmwareNVD

Affected:< 1.2.0.5Fixed in:1.2.0.5CVE-2021-46795derived from NVD

renoirpi-fp6 firmwareNVD

Affected:< 1.0.0.7Fixed in:1.0.0.7CVE-2021-46795derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.14%probability of exploitation in 30 days

3rdpercentile

Low risk: more likely to be exploited than 3% of all known CVEs.

References

Vendor Advisory1

amd.com

Related Vulnerabilities

Other CWE-367 (TOCTOU Race Condition) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-36980	High	8.1	83%	-	Fix
CVE-2024-30088	High	7.0	68%	KEV + Ransom	Fix
CVE-2004-0594	Medium	5.1	55%	-	Fix
CVE-2024-50379	Critical	9.8	44%	-	Fix
CVE-2023-38146	High	8.8	39%	-	Fix
CVE-2024-0132	Critical	9.0	37%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-04-09.