CVE-2024-21978

Improper input validation in SEV-SNP could allow a malicious hypervisor to read or overwrite...

6.0 MediumPublic exploit

Improper input validation in SEV-SNP could allow a malicious hypervisor to read or overwrite guest memory potentially leading to data leakage or data corruption.

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

0.49%Up 0.5 points since Aug 6, 2024

What each source reports

CVE List Score used 6.0

Improper input validation in SEV-SNP could allow a malicious hypervisor to read or overwrite guest memory potentially leading to data leakage or data corruption.

Record: CVE-2024-21978
CVSS 3.1: 6.0 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-20
Updated: 2026-11-02

EUVDEUVD-2024-19584 6.0

Improper input validation in SEV-SNP could allow a malicious hypervisor to read or overwrite guest memory potentially leading to data leakage or data corruption.

Record: EUVD-2024-19584
CVSS 3.1: 6.0 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-rf8m-mggj-3g74 6.0

Improper input validation in SEV-SNP could allow a malicious hypervisor to read or overwrite...

Improper input validation in SEV-SNP could allow a malicious hypervisor to read or overwrite guest memory potentially leading to data leakage or data corruption.

Record: GHSA-rf8m-mggj-3g74
CVSS 3.1: 6.0 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-20
Updated: 2026-11-02

NVD 6.0

Improper input validation in SEV-SNP could allow a malicious hypervisor to read or overwrite guest memory potentially leading to data leakage or data corruption.

Record: CVE-2024-21978
CVSS 3.1: 6.0 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
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-20
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-2024-21978-poc	2024-01-07

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-2024-21978 is a medium vulnerability (CVSS 6.0) 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 0.49%, the 42nd 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