What is the CVSS score of CVE-2021-26383?

CVE-2021-26383 has a CVSS 3.1 base score of 7.9 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Amd are affected by CVE-2021-26383?

CVE-2021-26383 presents notable security risk, a out-of-bounds write vulnerability rated CVSS 7.9.

How to fix or mitigate CVE-2021-26383?

Within 30 days: Identify all affected systems and apply vendor patches as part of regular patch cycle. If patching is delayed, consider network segmentation to limit exposure.

Amd CVE-2021-26383

HIGH

Out-of-bounds Write (CWE-787)

2025-09-06 psirt@amd.com

Memory Corruption Amd Buffer Overflow

7.9

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.9 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:10 vuln.today

CVE Published

Sep 06, 2025 - 00:15 nvd

HIGH 7.9

DescriptionCVE.org

Insufficient bounds checking in AMD TEE (Trusted Execution Environment) could allow an attacker with a compromised userspace to invoke a command with malformed arguments leading to out of bounds memory access, potentially resulting in loss of integrity or availability.

AnalysisAI

Insufficient bounds checking in AMD TEE (Trusted Execution Environment) could allow an attacker with a compromised userspace to invoke a command with malformed arguments leading to out of bounds. Rated high severity (CVSS 7.9), this vulnerability is low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. Insufficient bounds checking in AMD TEE (Trusted Execution Environment) could allow an attacker with a compromised userspace to invoke a command with malformed arguments leading to out of bounds memory access, potentially resulting in loss of integrity or availability.

Affected ProductsAI

See vendor advisory for affected versions.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).