CVE-2021-26379
9.8 · CRITICALOverview
CVE-2021-26379 is a critical-severity vulnerability affecting amd epyc_72f3_firmware. It was published on May 9, 2023 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Insufficient input validation of mailbox data in the
SMU may allow an attacker to coerce the SMU to corrupt SMRAM, potentially
leading to a loss of integrity and privilege escalation.
Remediation
Check the references section for vendor advisories and patches from amd. Update epyc_72f3_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| amd | epyc_72f3_firmware | >= 0, < milanpi_1.0.0.9 | Affected |
| amd | epyc_7313_firmware | >= 0, < milanpi_1.0.0.9 | Affected |
| amd | epyc_7313p_firmware | >= 0, < milanpi_1.0.0.9 | Affected |
| amd | epyc_7343_firmware | >= 0, < milanpi_1.0.0.9 | Affected |
| amd | epyc_7373x_firmware | >= 0, < milanpi_1.0.0.9 | Affected |
| amd | epyc_73f3_firmware | >= 0, < milanpi_1.0.0.9 | Affected |
| amd | epyc_7413_firmware | >= 0, < milanpi_1.0.0.9 | Affected |
| amd | epyc_7443_firmware | >= 0, < milanpi_1.0.0.9 | Affected |
| amd | epyc_7443p_firmware | >= 0, < milanpi_1.0.0.9 | Affected |
| amd | epyc_7453_firmware | >= 0, < milanpi_1.0.0.9 | Affected |
Frequently Asked Questions
What is CVE-2021-26379?
CVE-2021-26379 is a critical-severity vulnerability affecting amd epyc_72f3_firmware. It was published on May 9, 2023 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2021-26379?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-26379?
Check the references section for vendor advisories and patches from amd. Update epyc_72f3_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-26379?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-26379 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
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