CVE-2024-21978

MEDIUM

AMD EPYC 7003 Series Firmware < milanpi_1.0.0.d - Unauthenticated Memory Read/Write via SEV-SNP Input Validation

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2024-21978. PoCs published by Freax13.

AI-analyzed exploit summary This repository contains a functional exploit for CVE-2024-21978, a vulnerability in AMD SEV firmware that allows decrypting arbitrary memory of a running SEV-SNP guest by corrupting CONTEXT pages through improper state validation. The exploit leverages the SEV_INIT_EX command and SNP_PAGE_RECLAIM to manipulate memory states and achieve unauthorized decryption via SNP_DBG_DECRYPT.

Description

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.

Exploits (1)

nomisec WORKING POC 9 stars
by Freax13 · poc
https://github.com/Freax13/cve-2024-21978-poc

This repository contains a functional exploit for CVE-2024-21978, a vulnerability in AMD SEV firmware that allows decrypting arbitrary memory of a running SEV-SNP guest by corrupting CONTEXT pages through improper state validation. The exploit leverages the SEV_INIT_EX command and SNP_PAGE_RECLAIM to manipulate memory states and achieve unauthorized decryption via SNP_DBG_DECRYPT.

Classification
Working Poc 95%
Attack Type
Info Leak
Complexity
Complex
Reliability
Racy
Target: AMD SEV firmware version 1.55.16
Auth required
Prerequisites: Access to a host with AMD SEV-SNP enabled · Ability to execute privileged commands on the host · Victim guest with DEBUG policy disabled
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (1)

Core 1

Scores

CVSS v3 6.0
EPSS 0.0049
EPSS Percentile 38.4%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-20
Status published
Products (50)
amd/epyc_7203_firmware < milanpi_1.0.0.d
amd/epyc_7203p_firmware < milanpi_1.0.0.d
amd/epyc_72f3_firmware < milanpi_1.0.0.d
amd/epyc_7303_firmware < milanpi_1.0.0.d
amd/epyc_7303p_firmware < milanpi_1.0.0.d
amd/epyc_7313_firmware < milanpi_1.0.0.d
amd/epyc_7313p_firmware < milanpi_1.0.0.d
amd/epyc_7343_firmware < milanpi_1.0.0.d
amd/epyc_7373x_firmware < milanpi_1.0.0.d
amd/epyc_73f3_firmware < milanpi_1.0.0.d
... and 40 more
Published Aug 05, 2024
Tracked Since Feb 18, 2026