What’s Vulnerable › Vulnerabilities

CVE-2025-62864

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-16 · updated 2026-10-13
• Weakness: CWE-787

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.

Affected products

• Amperecomputing Ampereone A128-34X Firmware: before 4.4.5.2 — fixed in 4.4.5.2
• Amperecomputing Ampereone A144-24X Firmware: before 4.4.5.2 — fixed in 4.4.5.2
• Amperecomputing Ampereone A144-26M Firmware: before 5.4.5.1 — fixed in 5.4.5.1
• Amperecomputing Ampereone A144-27X Firmware: before 4.4.5.2 — fixed in 4.4.5.2
• Amperecomputing Ampereone A144-33M Firmware: before 5.4.5.1 — fixed in 5.4.5.1
• Amperecomputing Ampereone A160-28M Firmware: before 5.4.5.1 — fixed in 5.4.5.1
• Amperecomputing Ampereone A160-28X Firmware: before 4.4.5.2 — fixed in 4.4.5.2
• Amperecomputing Ampereone A192-26M Firmware: before 5.4.5.1 — fixed in 5.4.5.1
• Amperecomputing Ampereone A192-26X Firmware: before 4.4.5.2; before 3.5.9.3 — fixed in 3.5.9.3, 4.4.5.2
• Amperecomputing Ampereone A192-32M Firmware: before 5.4.5.1 — fixed in 5.4.5.1
• Amperecomputing Ampereone A192-32X Firmware: before 3.5.9.3 — fixed in 3.5.9.3
• Amperecomputing Ampereone A96-36M Firmware: before 5.4.5.1 — fixed in 5.4.5.1
• Amperecomputing Ampereone A96-36X Firmware: before 4.4.5.2 — fixed in 4.4.5.2

How to fix

Upgrade to a fixed version: 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 3.5.9.3, 4.4.5.2; Amperecomputing Ampereone A192-32M Firmware 5.4.5.1; Amperecomputing Ampereone A192-32X Firmware 3.5.9.3; Amperecomputing Ampereone A96-36M Firmware 5.4.5.1. Check the vendor advisory for mitigations.

References

• https://amperecomputing.com/products/product-security
• https://amperecomputing.com/products/security-bulletins/amp-sb-0007

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