CVE-2021-26340
High
Published: 10 December 2021
Published
10 December 2021
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1
8.4
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
EPSS Score
0.0006
18.5th percentile
Risk Priority
17
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2021-26340 is a high-severity an unspecified weakness vulnerability in Amd Epyc 7001 Firmware. Its CVSS base score is 8.4 (High).
Operationally, ranked at the 18.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-13146
Vulnerability details
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).
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
amd
epyc 7001 firmware
all versions
amd
epyc 7232p firmware
all versions
amd
epyc 7251 firmware
all versions
amd
epyc 7261 firmware
all versions
amd
epyc 7252 firmware
all versions
amd
epyc 74f3 firmware
all versions
amd
epyc 7501 firmware
all versions
amd
epyc 7502 firmware
all versions
amd
epyc 7502p firmware
all versions
amd
epyc 7513 firmware
all versions
+95 more product configuration(s) — see NVD for full list
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.