CVE-2021-26404
Improper input validation and bounds checking in SEV firmware may leak scratch buffer bytes...
Improper input validation and bounds checking in SEV firmware may leak scratch buffer bytes leading to potential information disclosure.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
Improper input validation and bounds checking in SEV firmware may leak scratch buffer bytes leading to potential information disclosure.
- Record
CVE-2021-26404- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
CVE List
Improper input validation and bounds checking in SEV firmware may leak scratch buffer bytes leading to potential information disclosure.
- Record
CVE-2021-26404- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
EUVDEUVD-2021-13210
Improper input validation and bounds checking in SEV firmware may leak scratch buffer bytes leading to potential information disclosure.
- Record
EUVD-2021-13210- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-m5wf-22jj-7772
Improper input validation and bounds checking in SEV firmware may leak scratch buffer bytes...
Improper input validation and bounds checking in SEV firmware may leak scratch buffer bytes leading to potential information disclosure.
- Record
GHSA-m5wf-22jj-7772- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-26404 is a medium vulnerability (CVSS 5.5) in Amd 3rd Gen Epyc, published January 10, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.19%, the 8th percentile. No source names a fixed version.