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 a192-32m firmware; amperecomputing: ampereone a192-32m; amperecomputing: ampereone a192-26m firmware; amperecomputing: ampereone a192-26m; amperecomputing: ampereone a160-28m firmware; amperecomputing: ampereone a160-28m; amperecomputing: ampereone a144-33m firmware; amperecomputing: ampereone a144-33m; amperecomputing: ampereone a144-26m firmware; amperecomputing: ampereone a144-26m; amperecomputing: ampereone a96-36m firmware; amperecomputing: ampereone a96-36m; amperecomputing: ampereone a96-36x firmware; amperecomputing: ampereone a96-36x; amperecomputing: ampereone a128-34x firmware
References2
- amperecomputing.com/products/product-security Vendor Advisory
- amperecomputing.com/products/security-bulletins/amp-sb-0007 Vendor Advisory
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 31 · as of 11 November 2026
- CWE
- CWE-787
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