VDB-336908 · CVE-2025-62862 · GCVE-0-2025-62862

Ampere AmpereOne AC03/AmpereOne AC04/AmpereOne M prior 3.5.9.3/4.4.5.2/5.4.5.1 SMC Call out-of-bounds write

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.6	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in Ampere AmpereOne AC03, AmpereOne AC04 and AmpereOne M. Affected by this vulnerability is an unknown functionality of the component SMC Call Handler. Such manipulation leads to out-of-bounds write. This vulnerability is listed as CVE-2025-62862. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Ampere AmpereOne AC03, AmpereOne AC04 and AmpereOne M. Affected by this issue is an unknown code block of the component SMC Call Handler. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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 Boot Error Record Table driver that could result in (1) an out-of-bounds read which leaks Secure-EL0 information to a process running in Non-Secure state or (2) an out-of-bounds write which corrupts Secure or Non-Secure memory, limited to memory mapped to UEFI-MM Secure Partition by the Secure Partition Manager.

The advisory is shared for download at amperecomputing.com. This vulnerability is handled as CVE-2025-62862 since 10/24/2025. The exploitation is known to be easy. There are neither technical details nor an exploit publicly available.

Upgrading to version 3.5.9.3, 4.4.5.2 or 5.4.5.1 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Ampere

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.6

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: AmpereOne AC03/AmpereOne AC04/AmpereOne M 3.5.9.3/4.4.5.2/5.4.5.1

Timelineinfo

10/24/2025 CVE reserved
12/16/2025 +53 days Advisory disclosed
12/16/2025 +0 days VulDB entry created
12/16/2025 +0 days VulDB entry last update

Sourcesinfo

Advisory: amperecomputing.com
Status: Confirmed

CVE: CVE-2025-62862 (🔒)
GCVE (CVE): GCVE-0-2025-62862
GCVE (VulDB): GCVE-100-336908

Entryinfo

Created: 12/16/2025 21:42
Changes: 12/16/2025 21:42 (54)
Complete: 🔍
Cache ID: 216::103