CVE-2025-62864

CRITICAL

AmpereOne Firmware - Out-of-bounds Write via SMC Call to UEFI-MM MMCommunicate Service

Title source: llm
STIX 2.1

Description

Ampere AmpereOne AC03 devices before 3.5.9.3, AmpereOne AC04 devices before 4.4.5.2, and AmpereOne M devices before 5.4.5.1 allow an incorrectly formed SMC call to UEFI-MM MMCommunicate service that could result in an out-of-bounds write within the UEFI-MM Secure Partition context.

References (2)

Core 2

Scores

CVSS v3 9.8
EPSS 0.0031
EPSS Percentile 22.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-787
Status published
Products (13)
amperecomputing/ampereone_a128-34x_firmware < 4.4.5.2
amperecomputing/ampereone_a144-24x_firmware < 4.4.5.2
amperecomputing/ampereone_a144-26m_firmware < 5.4.5.1
amperecomputing/ampereone_a144-27x_firmware < 4.4.5.2
amperecomputing/ampereone_a144-33m_firmware < 5.4.5.1
amperecomputing/ampereone_a160-28m_firmware < 5.4.5.1
amperecomputing/ampereone_a160-28x_firmware < 4.4.5.2
amperecomputing/ampereone_a192-26m_firmware < 5.4.5.1
amperecomputing/ampereone_a192-26x_firmware < 4.4.5.2
amperecomputing/ampereone_a192-32m_firmware < 5.4.5.1
... and 3 more
Published Dec 16, 2025
Tracked Since Feb 18, 2026