CVE-2021-26404
MEDIUMCVSS 5.5/10EPSS 0.18%
Last modified
CVE-2021-26404 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Improper input validation and bounds checking in SEV firmware may leak scratch buffer bytes leading to potential information disclosure. . EPSS estimates a 0.18% chance of exploitation in the next 30 days.
Description
Improper input validation and bounds checking in SEV firmware may leak scratch buffer bytes leading to potential information disclosure.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Amd | Epyc 7003 Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7313 Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7313p Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7343 Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7373x Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 73f3 Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7413 Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7443 Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7443p Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7453 Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7473x Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 74f3 Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7513 Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7543 Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7543p Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7573x Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7643 Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 75f3 Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7663 Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7713 Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7713p Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7763 Firmware | < milanpi-sp3_1.0.0.9 |
| Amd | Epyc 7773x Firmware | < milanpi-sp3_1.0.0.9 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-26404?
Improper input validation and bounds checking in SEV firmware may leak scratch buffer bytes leading to potential information disclosure.
How severe is CVE-2021-26404?
CVE-2021-26404 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2021-26404?
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-26404?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST