CVE-2024-21980

Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to...

7.9 HighPublic exploit

Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to potentially overwrite a guest's memory or UMC seed resulting in loss of confidentiality and integrity.

Attack profile

How easy it is to exploit

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

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: None

Exploit likelihood

0.45%Up 0.4 points since Aug 6, 2024

What each source reports

CVE List Score used 7.9

Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to potentially overwrite a guest's memory or UMC seed resulting in loss of confidentiality and integrity.

Record: CVE-2024-21980
CVSS 3.1: 7.9 HighCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Weakness: CWE-119
Updated: 2026-11-02

EUVDEUVD-2024-19586 7.9

Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to potentially overwrite a guest's memory or UMC seed resulting in loss of confidentiality and integrity.

Record: EUVD-2024-19586
CVSS 3.1: 7.9 HighCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-q9j5-9g8p-5h5q 7.9

Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to...

Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to potentially overwrite a guest's memory or UMC seed resulting in loss of confidentiality and integrity.

Record: GHSA-q9j5-9g8p-5h5q
CVSS 3.1: 7.9 HighCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Weakness: CWE-119, CWE-787
Updated: 2026-11-02

NVD 7.9

Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to potentially overwrite a guest's memory or UMC seed resulting in loss of confidentiality and integrity.

Record: CVE-2024-21980
CVSS 3.1: 7.9 HighCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Weakness: CWE-119, CWE-787
Updated: 2026-11-02

Affected products

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Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	Freax13/cve-2024-21980-poc	2024-01-10

History

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

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

In short

CVE-2024-21980 is a high vulnerability (CVSS 7.9) in Amd 3rd Gen Amd Epyc™ Processors, published August 5, 2024. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.45%, the 39th percentile. No source names a fixed version.

Attack profile

How easy it is to exploit

What an attacker can affect

Exploit likelihood

What each source reports

Affected products

Public exploits

History

In short

References