CVE-2021-26384

A malformed SMI (System Management Interface) command may allow an attacker to establish a...

7.8 High

A malformed SMI (System Management Interface) command may allow an attacker to establish a corrupted SMI Trigger Info data structure, potentially leading to out-of-bounds memory reads and writes when triggering an SMI resulting in a potential loss of resources.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.20%Down 0.7 points since Jul 15, 2022

What each source reports

NVD Score used 7.8

Record: CVE-2021-26384
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-125, CWE-787
Updated: 2026-11-02

CVE List No score

Record: CVE-2021-26384
Updated: 2026-11-02

EUVDEUVD-2021-13190 No score

Record: EUVD-2021-13190
Updated: 2026-11-03

GitHub AdvisoriesGHSA-cqhp-pw9h-ff47 7.8

A malformed SMI (System Management Interface) command may allow an attacker to establish a...

Record: GHSA-cqhp-pw9h-ff47
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-77
Updated: 2026-11-02

Affected products

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History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, published	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-26384 is a high vulnerability (CVSS 7.8) in Amd Athlon Gold 3150u Firmware, published July 14, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 10th percentile. No source names a fixed version.