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CVE-2024-21978

24
FAUCET Score

CVE-2024-21978 is a high-severity vulnerability affecting AMD's SEV-SNP technology, stemming from improper input validation. A malicious hypervisor could exploit this to read or overwrite guest memory, leading to data leakage or corruption. With a CVSS score of 7.9, this vulnerability requires high privileges but has low attack complexity, posing a significant risk to confidentiality and integrity. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion, indicating a low immediate threat of widespread attacks.

Impacted Technologies

VendorProductVersion(s)CPE
< milanpi_1.0.0.dCPE matchmatch criteria
cpe:2.3:o:amd:epyc_7203_firmware:*:*:*:*:*:*:*:*
< milanpi_1.0.0.dCPE matchmatch criteria
cpe:2.3:o:amd:epyc_7203p_firmware:*:*:*:*:*:*:*:*
< milanpi_1.0.0.dCPE matchmatch criteria
cpe:2.3:o:amd:epyc_72f3_firmware:*:*:*:*:*:*:*:*
< milanpi_1.0.0.dCPE matchmatch criteria
cpe:2.3:o:amd:epyc_7303_firmware:*:*:*:*:*:*:*:*
< milanpi_1.0.0.dCPE matchmatch criteria
cpe:2.3:o:amd:epyc_7303p_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.0MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
0.8
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.49%
Probability of exploitation in next 30 days
EPSS Percentile
39.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0049 is in the 83rd percentile among its peer group of 360 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2024-21978Moderate

linux-firmware: hw:amd: Improper input validation in SEV-SNP

Aug 5, 2024

References

https / /www.amd.com/en/resources/product-security/bulletin/amd-sb-3011.html
Broken Link