CVEvulnerability

CVE-2021-26340

8.4 HIGH Published 2021-12-10 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-12-10
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.4 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
CVSS 2.0 ([email protected])
3.6 LOW — AV:L/AC:L/Au:N/C:P/I:P/A:N

Description

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).

Affected configurations

• amd epyc 7001 firmware • amd epyc 7232p firmware • amd epyc 7251 firmware • amd epyc 7261 firmware • amd epyc 7252 firmware • amd epyc 74f3 firmware • amd epyc 7501 firmware • amd epyc 7502 firmware • amd epyc 7502p firmware • amd epyc 7513 firmware • amd epyc 7532 firmware • amd epyc 7542 firmware • amd epyc 7543 firmware • amd epyc 7543p firmware • amd epyc 7551 firmware • amd epyc 7551p firmware • amd epyc 7552 firmware • amd epyc 75f3 firmware • amd epyc 7601 firmware • amd epyc 7642 firmware • amd epyc 7643 firmware • amd epyc 7662 firmware • amd epyc 7663 firmware • amd epyc 7702p firmware • amd epyc 7702 firmware • amd epyc 7713 firmware • amd epyc 7713p firmware • amd epyc 7742 firmware • amd epyc 7763 firmware • amd epyc 7f32 firmware • amd epyc 7f52 firmware • amd epyc 7262 firmware • amd epyc 7272 firmware • amd epyc 7281 firmware • amd epyc 7282 firmware • amd epyc 72f3 firmware • amd epyc 7302 firmware • amd epyc 7301 firmware • amd epyc 7302p firmware • amd epyc 7313 firmware • amd epyc 7313p firmware • amd epyc 7343 firmware • amd epyc 7351 firmware • amd epyc 7351p firmware • amd epyc 7352 firmware • amd epyc 7371 firmware • amd epyc 73f3 firmware • amd epyc 7401 firmware • amd epyc 7401p firmware • amd epyc 7402 firmware • amd epyc 7402p firmware • amd epyc 7413 firmware • amd epyc 7443p firmware • amd epyc 7443 firmware • amd epyc 7451 firmware • amd epyc 7452 firmware • amd epyc 7453 firmware • amd epyc 7f72 firmware • amd epyc 7h12 firmware • amd epyc embedded 3101 firmware … and 45 more

References