CVE-2024-21980

Guest memory corruption via unrestricted SNP firmware writes

Published Aug 5, 2024 · Updated Aug 5, 2024

Memory corruption in AMD EPYC SEV-SNP firmware allows malicious hypervisors to overwrite guest memory or the UMC seed. The firmware improperly restricts write operations, but AMD has not disclosed the affected routine, validation failure, or crafted input. Host control with high privileges is required; exploitation corrupts protected guest data or seed material, compromising confidentiality and integrity without reported availability impact.

CVSS severity7.9
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in AMD EPYC SEV-SNP firmware allows malicious hypervisors to overwrite guest memory or the UMC seed. The firmware improperly restricts write operations, but AMD has not disclosed the affected routine, validation failure, or crafted input. Host control with high privileges is required; exploitation corrupts protected guest data or seed material, compromising confidentiality and integrity without reported availability impact.

The record

CVE
CVE-2024-21980
Published
Aug 5, 2024
Updated
Aug 5, 2024
Vendor
Advanced Micro Devices, Inc.
Product
AMD EPYC 9754S Firmware
Classifications
CWE-787, CWE-119, T1565
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <genoapi_1.0.0.c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Advanced Micro Devices, Inc. · AMD EPYC 9754S Firmwareversion=0 <genoapi_1.0.0.c
Advanced Micro Devices, Inc. · AMD EPYC Embedded 7003 Series Processorsversion=various <EmbMilanPI-SP3 1.0.0.9
Advanced Micro Devices, Inc. · AMD EPYC Embedded 9003 Series Processorsversion=various <EmbGenoaPI-SP5 1.0.0.7
Advanced Micro Devices, Inc. · AMD EPYC 7773X Firmwareversion=0 <milanpi_1.0.0.d
Advanced Micro Devices, Inc. · 4th Gen AMD EPYC Processorsversion=various <GenoaPI 1.0.0.C
Advanced Micro Devices, Inc. · AMD EPYC 7003 Firmwareversion=0 <milanpi_1.0.0.9_sp3
Advanced Micro Devices, Inc. · AMD EPYC™ 7003 Series Processorsversion=various <MilanPI 1.0.0.D

Published CVSS scores

7.9Advanced Micro Devices, Inc.CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1565Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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