Ampere AmpereOne AC03/AmpereOne AC04/AmpereOne M prior 3.5.9.3/4.4.5.2/5.4.5.1 UEFI-MM PCIe Driver out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Ampere AmpereOne AC03, AmpereOne AC04 and AmpereOne M. It has been rated as critical. This impacts an unknown function of the component UEFI-MM PCIe Driver. The manipulation leads to out-of-bounds write. This vulnerability is uniquely identified as CVE-2025-62863. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Ampere AmpereOne AC03, AmpereOne AC04 and AmpereOne M. This issue affects an unknown function of the component UEFI-MM PCIe Driver. 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. The summary by CVE is:

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 PCIe driver that could result in an out-of-bounds write within PCIe driver’s S-EL0 address space.

The advisory is shared at amperecomputing.com. The identification of this vulnerability is CVE-2025-62863 since 10/24/2025. The exploitation is known to be easy. Neither technical details nor an exploit are publicly available.

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

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-203818). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔒

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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
12/17/2025 +1 days VulDB entry last update

Sourcesinfo

Advisory: amperecomputing.com
Status: Confirmed

CVE: CVE-2025-62863 (🔒)
GCVE (CVE): GCVE-0-2025-62863
GCVE (VulDB): GCVE-100-336917
EUVD: 🔒

Entryinfo

Created: 12/16/2025 21:45
Updated: 12/17/2025 16:09
Changes: 12/16/2025 21:45 (54), 12/17/2025 16:09 (1)
Complete: 🔍
Cache ID: 216::103

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