CVE-2021-26406 json
Insufficient validation in parsing Owner's Certificate Authority (OCA) certificates in SEV (AMD Secure Encrypted Virtualization) and SEV-ES…
published 2023-05-09 3 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13212
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 36%
- public exploits
- 0
- none known
Summary
Insufficient validation in parsing Owner's Certificate Authority (OCA) certificates in SEV (AMD Secure Encrypted Virtualization) and SEV-ES user application can lead to a host crash potentially resulting in denial of service.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 21 mo ago
Exploit prediction
0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
- AMD Ryzen™ 2000 series Desktop Processors “Raven Ridge” AM4
- AMD Ryzen™ 2000 Series Desktop Processors “Pinnacle Ridge”
- AMD Ryzen™ 3000 Series Desktop Processors “Matisse” AM4
- AMD AMD Ryzen™ 5000 Series Desktop Processors “Vermeer” AM4
- AMD 2nd Gen AMD Ryzen™ Threadripper™ Processors “Colfax”
- AMD 3rd Gen AMD Ryzen™ Threadripper™ Processors “Castle Peak” HEDT
- AMD Ryzen™ Threadripper™ PRO Processors “Castle Peak” WS
- AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Dali”/”Dali” ULP
- AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Pollock”
- AMD Ryzen™ 2000 Series Mobile Processors “Raven Ridge” FP5
- AMD Ryzen™ 3000 Series Mobile processor, 2nd Gen AMD Ryzen™ Mobile Processors with Radeon™ Graphics “Picasso”
- AMD 1st Gen AMD EPYC™ Processors
- AMD 2nd Gen AMD EPYC™ Processors
References
-
amd.com
/en/corporate/product-security/bulletin/AMD-SB-4001
vendor-advisory
-
amd.com
/en/corporate/product-security/bulletin/AMD-SB-3001
vendor-advisory
Sources
- CVE List CVE-2021-26406
- NVD CVE-2021-26406
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.