CVE-2021-39298

Potential vulnerabilities have been identified in UEFI firmware (BIOS) for some PC products which...

8.8 High

A potential vulnerability in AMD System Management Mode (SMM) interrupt handler may allow an attacker with high privileges to access the SMM resulting in arbitrary code execution which could be used by malicious actors to bypass security mechanisms provided in the UEFI firmware.

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

0.37%Down 2.2 points since Feb 17, 2022

What each source reports

NVD Score used 8.8

Record: CVE-2021-39298
CVSS 3.1: 8.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0: 7.2 HighAV:L/AC:L/Au:N/C:C/I:C/A:C
Weakness: CWE-269
Updated: 2026-11-02

CVE List 6.5

Record: CVE-2021-39298
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-269
Updated: 2026-11-02

EUVDEUVD-2021-25659 6.5

Record: EUVD-2021-25659
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-jxf5-m5fg-rw27 8.8

Potential vulnerabilities have been identified in UEFI firmware (BIOS) for some PC products which...

Potential vulnerabilities have been identified in UEFI firmware (BIOS) for some PC products which may allow escalation of privilege and arbitrary code execution.

Record: GHSA-jxf5-m5fg-rw27
CVSS 3.1: 8.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-269
Updated: 2026-11-02

Affected products

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History

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

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

In short

CVE-2021-39298 is a high vulnerability (CVSS 8.8) in Amd 2nd Gen Epyc, published February 16, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.37%, the 31st percentile. No source names a fixed version.