CVE-2021-26404 json
Improper input validation and bounds checking in SEV firmware may leak scratch buffer bytes leading to potential information disclosure.
published 2023-01-10 3 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13210
- cvss
- 5.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 8%
- public exploits
- 0
- none known
Summary
Improper input validation and bounds checking in SEV firmware may leak scratch buffer bytes leading to potential information disclosure.
Patch / fix
- 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
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 19 mo ago
Exploit prediction
0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| CNA | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
Affected products
- AMD 3rd Gen EPYC
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
amd.com
/en/corporate/product-security/bulletin/AMD-SB-1032
vendor-advisory
Sources
- CVE List CVE-2021-26404
- NVD CVE-2021-26404
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.