Buffer overflow in Amperecomputing Ampereone A128-34x
CVE-2025-62864
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.
Vulnerability class: Buffer Overflow
EPSS: 0.003 (24.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Amperecomputing Ampereone_a128-34x
- Amperecomputing Ampereone_a128-34x_firmware
- Amperecomputing Ampereone_a144-24x
- Amperecomputing Ampereone_a144-24x_firmware
- Amperecomputing Ampereone_a144-26m
- Amperecomputing Ampereone_a144-26m_firmware
- Amperecomputing Ampereone_a144-27x
- Amperecomputing Ampereone_a144-27x_firmware
- Amperecomputing Ampereone_a144-33m
- Amperecomputing Ampereone_a144-33m_firmware
Weakness classification (CWE)
References
- cve@mitre.org (Vendor Advisory)
- cve@mitre.org (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-62864?
- CVE-2025-62864 is a critical-severity vulnerability in Amperecomputing Ampereone A128-34x, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2025-12-16.
- How severe is CVE-2025-62864?
- Critical severity. CVSS v3 base score is 9.8 out of 10.