CVE-2021-26340
First published: Fri Dec 10 2021(Updated: )
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).
Credit: psirt@amd.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Amd Epyc Server Firmware | ||
| AMD EPYC 7001 Firmware | ||
| AMD EPYC 7232p firmware | ||
| AMD EPYC 7232p firmware | ||
| AMD EPYC 7251 Firmware | ||
| AMD EPYC 7251 Firmware | ||
| AMD EPYC 7261 Firmware | ||
| AMD EPYC 7261 | ||
| AMD EPYC 7252 Firmware | ||
| AMD EPYC 7252 Firmware | ||
| AMD EPYC 74F3 Firmware | ||
| AMD EPYC 74F3 Firmware | ||
| AMD EPYC 7501 Firmware | ||
| AMD EPYC Server | ||
| AMD EPYC 7502 Firmware | ||
| AMD EPYC 7502 firmware | ||
| AMD EPYC 7502P Firmware | ||
| AMD EPYC 7502P Firmware | ||
| AMD EPYC 7513 Firmware | ||
| AMD EPYC 7513 Firmware | ||
| AMD EPYC 7532 Firmware | ||
| AMD EPYC 7532 Firmware | ||
| AMD EPYC 7542 Firmware | ||
| AMD EPYC Server | ||
| Amd Epyc Server Firmware | ||
| AMD EPYC 7543 Firmware | ||
| AMD EPYC 7543P Firmware | ||
| AMD EPYC 7543P Firmware | ||
| AMD EPYC 7551P Firmware | ||
| AMD EPYC 7551 Firmware | ||
| AMD EPYC 7551P Firmware | ||
| AMD EPYC 7551P Firmware | ||
| AMD EPYC 7552 Firmware | ||
| AMD EPYC 7552 Firmware | ||
| AMD EPYC 75F3 Firmware | ||
| AMD EPYC 75F3 Firmware | ||
| AMD EPYC 7601 Firmware | ||
| AMD EPYC 7601 Firmware | ||
| AMD EPYC 7642 Firmware | ||
| AMD EPYC 7642 Firmware | ||
| AMD EPYC 7643P Firmware | ||
| AMD EPYC 7643 Firmware | ||
| AMD EPYC 7662 Firmware | ||
| AMD EPYC 7662 Firmware | ||
| AMD EPYC 7663 Firmware | ||
| AMD EPYC 7663 Firmware | ||
| AMD EPYC 7702 Firmware | ||
| AMD EPYC 7702P | ||
| AMD EPYC 7702p firmware | ||
| AMD EPYC Server | ||
| AMD EPYC 7713P Firmware | ||
| AMD EPYC 7713 Firmware | ||
| AMD EPYC 7713P Firmware | ||
| AMD EPYC 7713P Firmware | ||
| AMD EPYC 7742 Firmware | ||
| AMD EPYC Server | ||
| AMD EPYC 7763 Firmware | ||
| AMD EPYC 7763 Firmware | ||
| AMD EPYC 7F32 Firmware | ||
| AMD EPYC 7F32 Firmware | ||
| AMD EPYC 7F52 Firmware | ||
| AMD EPYC 7F52 Firmware | ||
| AMD EPYC 7262 Firmware | ||
| AMD EPYC 7262 Firmware | ||
| AMD EPYC 7272 firmware | ||
| AMD EPYC 7272 firmware | ||
| Amd Epyc Server Firmware | ||
| AMD EPYC Server | ||
| AMD EPYC 7282 Firmware | ||
| AMD EPYC 7282 Firmware | ||
| AMD EPYC 72F3 Firmware | ||
| AMD EPYC 72F3 Firmware | ||
| Amd Epyc Server Firmware | ||
| AMD EPYC 7302 Firmware | ||
| Amd Epyc Server Firmware | ||
| AMD EPYC 7301 Firmware | ||
| AMD EPYC 7302P Firmware | ||
| AMD EPYC 7302P Firmware | ||
| AMD EPYC Firmware | ||
| AMD EPYC 7313 Firmware | ||
| AMD EPYC 7313P Firmware | ||
| AMD EPYC 7313P Firmware | ||
| Amd Epyc Server Firmware | ||
| AMD EPYC 7343 Firmware | ||
| AMD EPYC 7351P Firmware | ||
| AMD EPYC 7351 Firmware | ||
| AMD EPYC 7351P Firmware | ||
| AMD EPYC 7351P Firmware | ||
| AMD EPYC Firmware | ||
| AMD EPYC 7352 firmware | ||
| AMD EPYC 7371 Firmware | ||
| AMD EPYC 7371 Firmware | ||
| AMD EPYC 73F3 Firmware | ||
| AMD EPYC 73F3 Firmware | ||
| AMD EPYC 7401P Firmware | ||
| AMD EPYC 7401 Firmware | ||
| AMD EPYC 7401P Firmware | ||
| AMD EPYC 7401P Firmware | ||
| Amd Epyc Server Firmware | ||
| AMD EPYC 7402 Firmware | ||
| AMD EPYC 7402P Firmware | ||
| AMD EPYC 7402P Firmware | ||
| AMD EPYC 7413 Firmware | ||
| AMD EPYC 7413 Firmware | ||
| AMD EPYC 7443P Firmware | ||
| AMD EPYC 7443P Firmware | ||
| AMD EPYC 7443P Firmware | ||
| AMD EPYC 7443P | ||
| AMD EPYC 7451 Firmware | ||
| AMD EPYC 7451 Firmware | ||
| AMD EPYC 7452 Firmware | ||
| AMD EPYC Server | ||
| Amd Epyc Server Firmware | ||
| AMD EPYC Server | ||
| AMD EPYC 7F72 | ||
| AMD EPYC 7F72 Firmware | ||
| AMD EPYC 7H12 Firmware | ||
| AMD EPYC 7H12 Firmware | ||
| AMD EPYC Embedded 3101 Firmware | ||
| AMD EPYC Embedded 3101 | ||
| AMD EPYC Embedded 3151 Firmware | ||
| AMD EPYC Embedded 3151 | ||
| AMD EPYC Embedded 3201 Firmware | ||
| AMD EPYC Embedded 3201 | ||
| AMD EPYC Embedded 3251 Firmware | ||
| AMD EPYC Embedded 3251 | ||
| AMD EPYC Embedded 3255 Firmware | ||
| AMD EPYC Embedded 3255 | ||
| AMD EPYC Embedded 3351 Firmware | ||
| AMD EPYC Embedded 3351 Firmware | ||
| AMD EPYC Embedded 3451 Firmware | ||
| AMD EPYC Embedded 3451 Firmware | ||
| AMD EPYC Embedded 7601 Firmware | ||
| AMD EPYC Embedded 7601 Firmware | ||
| AMD EPYC Embedded 7551 Firmware | ||
| AMD EPYC Embedded 7551 Firmware | ||
| AMD EPYC Embedded 7501 Firmware | ||
| AMD EPYC Embedded 7501 Firmware | ||
| AMD EPYC Embedded 7451 Firmware | ||
| AMD EPYC Embedded 7451 Firmware | ||
| AMD EPYC Embedded 7401 Firmware | ||
| AMD EPYC Embedded 7401 | ||
| AMD EPYC Embedded 7371 Firmware | ||
| AMD EPYC Embedded 7371 Firmware | ||
| AMD EPYC Embedded 7351 Firmware | ||
| AMD EPYC Embedded 7351 | ||
| AMD EPYC Embedded 7301 Firmware | ||
| AMD EPYC Embedded 7301 Firmware | ||
| AMD EPYC Embedded 7281 Firmware | ||
| AMD EPYC 7281 | ||
| AMD EPYC Embedded 7261 Firmware | ||
| AMD EPYC Embedded 7261 Firmware | ||
| AMD EPYC Embedded 7251 Firmware | ||
| AMD EPYC Embedded 7251 | ||
| AMD EPYC Embedded 755P | ||
| AMD EPYC Embedded 755P | ||
| AMD EPYC Embedded 740P | ||
| AMD EPYC Embedded 740P | ||
| AMD EPYC Embedded 735P | ||
| AMD EPYC Embedded 735P Firmware | ||
| AMD EPYC 7H12 Firmware | ||
| AMD EPYC Embedded 7H12 Firmware | ||
| AMD EPYC Embedded 7742 Firmware | ||
| AMD EPYC Embedded 7742 Firmware | ||
| AMD EPYC 7702p firmware | ||
| AMD EPYC Embedded 7702P | ||
| AMD EPYC Embedded 7662 Firmware | ||
| AMD EPYC Embedded 7662 Firmware | ||
| AMD EPYC Embedded 7642 Firmware | ||
| AMD EPYC Embedded 7642 Firmware | ||
| AMD EPYC Embedded 7552 Firmware | ||
| AMD EPYC Embedded 7552 | ||
| AMD EPYC Embedded 7542 Firmware | ||
| AMD EPYC Embedded 7542 Firmware | ||
| AMD EPYC Embedded 7532 Firmware | ||
| AMD EPYC Embedded 7532 Firmware | ||
| AMD EPYC Embedded 7502P Firmware | ||
| AMD EPYC Embedded 7502P Firmware | ||
| AMD EPYC Embedded 7452 Firmware | ||
| AMD EPYC Embedded 7452 Firmware | ||
| AMD EPYC 7F72 Firmware | ||
| AMD EPYC Embedded 7F72 Firmware | ||
| AMD EPYC Embedded 7402P Firmware | ||
| AMD EPYC Embedded 7402 Firmware | ||
| AMD EPYC Embedded 7352 Firmware | ||
| AMD EPYC Embedded 7352 Firmware | ||
| AMD EPYC 7F52 Firmware | ||
| AMD EPYC Embedded 7F52 Firmware | ||
| AMD EPYC Embedded 7302P Firmware | ||
| AMD EPYC Embedded 7302P Firmware | ||
| AMD EPYC Embedded 7282 Firmware | ||
| AMD EPYC Embedded 7282 Firmware | ||
| AMD EPYC Embedded 7272 Firmware | ||
| AMD EPYC Embedded 7272 Firmware | ||
| AMD EPYC 7F32 Firmware | ||
| AMD EPYC Embedded 7F32 Firmware | ||
| AMD EPYC Embedded 7262 Firmware | ||
| AMD EPYC Embedded 7262 Firmware | ||
| AMD EPYC Embedded 7252 Firmware | ||
| AMD EPYC Embedded 7252 Firmware | ||
| AMD EPYC 7702p firmware | ||
| AMD EPYC 7702P | ||
| AMD EPYC Embedded 7502P Firmware | ||
| AMD EPYC Embedded 7502P Firmware | ||
| AMD EPYC Embedded 7402 Firmware | ||
| AMD EPYC Embedded 7402P Firmware | ||
| AMD EPYC Embedded 7302P | ||
| AMD EPYC Embedded 7302P Firmware | ||
| AMD EPYC Embedded 7232P Firmware | ||
| AMD EPYC Embedded 7232P Firmware |
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Frequently Asked Questions
What is the severity of CVE-2021-26340?
CVE-2021-26340 has a CVSS score that indicates a high severity due to the potential for privilege escalation and unexpected behavior in vulnerable AMD EPYC firmware.
How do I fix CVE-2021-26340?
To remediate CVE-2021-26340, users should update their AMD EPYC firmware to the latest version provided by the manufacturer.
Which systems are affected by CVE-2021-26340?
CVE-2021-26340 affects various AMD EPYC series firmware versions including 7001, 7232p, 7251, and others listed in the vulnerability documentation.
What types of attacks can exploit CVE-2021-26340?
CVE-2021-26340 can be exploited by an unprivileged attacker process within an SEV/SEV-ES guest VM, potentially allowing for privilege escalation.
Is my AMD EPYC system vulnerable to CVE-2021-26340?
To determine vulnerability to CVE-2021-26340, check your firmware version against the list of affected versions in the advisory from AMD.
- agent/type
- agent/references
- agent/severity
- agent/author
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/event
- agent/first-publish-date
- agent/source
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/softwarecombine
- vendor/amd
- canonical/amd epyc server firmware
- canonical/amd epyc 7001 firmware
- canonical/amd epyc 7232p firmware
- canonical/amd epyc 7251 firmware
- canonical/amd epyc 7261 firmware
- canonical/amd epyc 7261
- canonical/amd epyc 7252 firmware
- canonical/amd epyc 74f3 firmware
- canonical/amd epyc 7501 firmware
- canonical/amd epyc server
- canonical/amd epyc 7502 firmware
- canonical/amd epyc 7502p firmware
- canonical/amd epyc 7513 firmware
- canonical/amd epyc 7532 firmware
- canonical/amd epyc 7542 firmware
- canonical/amd epyc 7543 firmware
- canonical/amd epyc 7543p firmware
- canonical/amd epyc 7551p firmware
- canonical/amd epyc 7551 firmware
- canonical/amd epyc 7552 firmware
- canonical/amd epyc 75f3 firmware
- canonical/amd epyc 7601 firmware
- canonical/amd epyc 7642 firmware
- canonical/amd epyc 7643p firmware
- canonical/amd epyc 7643 firmware
- canonical/amd epyc 7662 firmware
- canonical/amd epyc 7663 firmware
- canonical/amd epyc 7702 firmware
- canonical/amd epyc 7702p
- canonical/amd epyc 7702p firmware
- canonical/amd epyc 7713p firmware
- canonical/amd epyc 7713 firmware
- canonical/amd epyc 7742 firmware
- canonical/amd epyc 7763 firmware
- canonical/amd epyc 7f32 firmware
- canonical/amd epyc 7f52 firmware
- canonical/amd epyc 7262 firmware
- canonical/amd epyc 7272 firmware
- canonical/amd epyc 7282 firmware
- canonical/amd epyc 72f3 firmware
- canonical/amd epyc 7302 firmware
- canonical/amd epyc 7301 firmware
- canonical/amd epyc 7302p firmware
- canonical/amd epyc firmware
- canonical/amd epyc 7313 firmware
- canonical/amd epyc 7313p firmware
- canonical/amd epyc 7343 firmware
- canonical/amd epyc 7351p firmware
- canonical/amd epyc 7351 firmware
- canonical/amd epyc 7352 firmware
- canonical/amd epyc 7371 firmware
- canonical/amd epyc 73f3 firmware
- canonical/amd epyc 7401p firmware
- canonical/amd epyc 7401 firmware
- canonical/amd epyc 7402 firmware
- canonical/amd epyc 7402p firmware
- canonical/amd epyc 7413 firmware
- canonical/amd epyc 7443p firmware
- canonical/amd epyc 7443p
- canonical/amd epyc 7451 firmware
- canonical/amd epyc 7452 firmware
- canonical/amd epyc 7f72
- canonical/amd epyc 7f72 firmware
- canonical/amd epyc 7h12 firmware
- canonical/amd epyc embedded 3101 firmware
- canonical/amd epyc embedded 3101
- canonical/amd epyc embedded 3151 firmware
- canonical/amd epyc embedded 3151
- canonical/amd epyc embedded 3201 firmware
- canonical/amd epyc embedded 3201
- canonical/amd epyc embedded 3251 firmware
- canonical/amd epyc embedded 3251
- canonical/amd epyc embedded 3255 firmware
- canonical/amd epyc embedded 3255
- canonical/amd epyc embedded 3351 firmware
- canonical/amd epyc embedded 3451 firmware
- canonical/amd epyc embedded 7601 firmware
- canonical/amd epyc embedded 7551 firmware
- canonical/amd epyc embedded 7501 firmware
- canonical/amd epyc embedded 7451 firmware
- canonical/amd epyc embedded 7401 firmware
- canonical/amd epyc embedded 7401
- canonical/amd epyc embedded 7371 firmware
- canonical/amd epyc embedded 7351 firmware
- canonical/amd epyc embedded 7351
- canonical/amd epyc embedded 7301 firmware
- canonical/amd epyc embedded 7281 firmware
- canonical/amd epyc 7281
- canonical/amd epyc embedded 7261 firmware
- canonical/amd epyc embedded 7251 firmware
- canonical/amd epyc embedded 7251
- canonical/amd epyc embedded 755p
- canonical/amd epyc embedded 740p
- canonical/amd epyc embedded 735p
- canonical/amd epyc embedded 735p firmware
- canonical/amd epyc embedded 7h12 firmware
- canonical/amd epyc embedded 7742 firmware
- canonical/amd epyc embedded 7702p
- canonical/amd epyc embedded 7662 firmware
- canonical/amd epyc embedded 7642 firmware
- canonical/amd epyc embedded 7552 firmware
- canonical/amd epyc embedded 7552
- canonical/amd epyc embedded 7542 firmware
- canonical/amd epyc embedded 7532 firmware
- canonical/amd epyc embedded 7502p firmware
- canonical/amd epyc embedded 7452 firmware
- canonical/amd epyc embedded 7f72 firmware
- canonical/amd epyc embedded 7402p firmware
- canonical/amd epyc embedded 7402 firmware
- canonical/amd epyc embedded 7352 firmware
- canonical/amd epyc embedded 7f52 firmware
- canonical/amd epyc embedded 7302p firmware
- canonical/amd epyc embedded 7282 firmware
- canonical/amd epyc embedded 7272 firmware
- canonical/amd epyc embedded 7f32 firmware
- canonical/amd epyc embedded 7262 firmware
- canonical/amd epyc embedded 7252 firmware
- canonical/amd epyc embedded 7302p
- canonical/amd epyc embedded 7232p firmware