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CVE-2025-62864

CRITICALCVSS 9.8/10EPSS 0.31%

Last modified

CVE-2025-62864 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 0.31% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.31%

23.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
AmperecomputingAmpereone A192-32m Firmware< 5.4.5.1
AmperecomputingAmpereone A192-26m Firmware< 5.4.5.1
AmperecomputingAmpereone A160-28m Firmware< 5.4.5.1
AmperecomputingAmpereone A144-33m Firmware< 5.4.5.1
AmperecomputingAmpereone A144-26m Firmware< 5.4.5.1
AmperecomputingAmpereone A96-36m Firmware< 5.4.5.1
AmperecomputingAmpereone A96-36x Firmware< 4.4.5.2
AmperecomputingAmpereone A128-34x Firmware< 4.4.5.2
AmperecomputingAmpereone A144-24x Firmware< 4.4.5.2
AmperecomputingAmpereone A144-27x Firmware< 4.4.5.2
AmperecomputingAmpereone A160-28x Firmware< 4.4.5.2
AmperecomputingAmpereone A192-26x Firmware< 4.4.5.2
AmperecomputingAmpereone A192-26x Firmware< 3.5.9.3
AmperecomputingAmpereone A192-32x Firmware< 3.5.9.3

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is 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.
How severe is CVE-2025-62864?
CVE-2025-62864 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.
How do I fix CVE-2025-62864?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-62864?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST