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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (27.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
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
- amperecomputing.com/products/product-security (Vendor Advisory)
- amperecomputing.com/products/security-bulletins/amp-sb-0007 (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.