CVE-2021-46756

CRITICAL

AMD EPYC Firmware - Denial of Service and Integrity Loss via SVC_MAP_USER_STACK Input Validation

Title source: llm
STIX 2.1

Description

Insufficient validation of inputs in SVC_MAP_USER_STACK in the ASP (AMD Secure Processor) bootloader may allow an attacker with a malicious Uapp or ABL to send malformed or invalid syscall to the bootloader resulting in a potential denial of service and loss of integrity.

References (2)

Core 2

Scores

CVSS v3 9.1
EPSS 0.0018
EPSS Percentile 38.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-20
Status published
Products (50)
amd/epyc_7232p_firmware romepi_1.0.0.e
amd/epyc_7251_firmware naplespi_1.0.0.j
amd/epyc_7252_firmware romepi_1.0.0.e
amd/epyc_7261_firmware naplespi_1.0.0.j
amd/epyc_7262_firmware romepi_1.0.0.e
amd/epyc_7272_firmware romepi_1.0.0.e
amd/epyc_7281_firmware naplespi_1.0.0.j
amd/epyc_7282_firmware romepi_1.0.0.e
amd/epyc_72f3_firmware milanpi_1.0.0.9
amd/epyc_7301_firmware naplespi_1.0.0.j
... and 40 more
Published May 09, 2023
Tracked Since Feb 18, 2026