CVE-2023-31346

MEDIUM

AMD EPYC 7003 Series Firmware < milanpi_1.0.0.c - Privileged Stale Data Exposure via Uninitialized Memory

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2023-31346. PoCs published by Freax13.

AI-analyzed exploit summary This repository contains a proof-of-concept exploit for CVE-2023-31346, demonstrating memory leaks in guest message headers and CPUID request guest messages in SEV-SNP environments. The PoC includes host and guest components to observe leaked values under specific conditions.

Description

Failure to initialize memory in SEV Firmware may allow a privileged attacker to access stale data from other guests.

Exploits (1)

nomisec WORKING POC 1 stars
by Freax13 · poc
https://github.com/Freax13/cve-2023-31346-poc

This repository contains a proof-of-concept exploit for CVE-2023-31346, demonstrating memory leaks in guest message headers and CPUID request guest messages in SEV-SNP environments. The PoC includes host and guest components to observe leaked values under specific conditions.

Classification
Working Poc 90%
Attack Type
Info Leak
Complexity
Complex
Reliability
Racy
Target: AMD SEV-SNP (Secure Encrypted Virtualization-Secure Nested Paging)
No auth needed
Prerequisites: Linux kernel with SEV-SNP host support · Rust toolchain · Specific hardware/software configuration for SEV-SNP
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (1)

Core 1
Core References

Scores

CVSS v3 6.0
EPSS 0.0031
EPSS Percentile 22.6%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-284
Status published
Products (50)
amd/epyc_7203_firmware < milanpi_1.0.0.c
amd/epyc_7203p_firmware < milanpi_1.0.0.c
amd/epyc_72f3_firmware < milanpi_1.0.0.c
amd/epyc_7303_firmware < milanpi_1.0.0.c
amd/epyc_7303p_firmware < milanpi_1.0.0.c
amd/epyc_7313_firmware < milanpi_1.0.0.c
amd/epyc_7313p_firmware < milanpi_1.0.0.c
amd/epyc_7343_firmware < milanpi_1.0.0.c
amd/epyc_7373x_firmware < milanpi_1.0.0.c
amd/epyc_73f3_firmware < milanpi_1.0.0.c
... and 40 more
Published Feb 13, 2024
Tracked Since Feb 18, 2026