CVE-2021-26340 json
A malicious hypervisor in conjunction with an unprivileged attacker process inside an SEV/SEV-ES guest VM may fail to flush the Translation…
published 2021-12-10 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13146
- cvss
- 8.4
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 16%
- public exploits
- 0
- none known
Summary
A malicious hypervisor in conjunction with an unprivileged attacker process inside an SEV/SEV-ES guest VM may fail to flush the Translation Lookaside Buffer (TLB) resulting in unexpected behavior inside the virtual machine (VM).
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.4 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N |
| NVD | 2.0 | 3.6 | AV:L/AC:L/Au:N/C:P/I:P/A:N |
Affected products
- AMD AMD EPYC™
References
-
amd.com
/en/corporate/product-security/bulletin/amd-sb-1023
vendor-advisory
Sources
- CVE List CVE-2021-26340
- NVD CVE-2021-26340
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.