Vulnerability Monitor

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CVE-2021-26342

In SEV guest VMs, the CPU may fail to flush the Translation Lookaside Buffer (TLB) following a particular sequence of operations that includes creation of a new virtual machine control block (VMCB). The failure to flush the TLB may cause the microcode to use stale TLB translations which may allow for disclosure of SEV guest memory contents. Users of SEV-ES/SEV-SNP guest VMs are not impacted by this vulnerability.

Published

2022-05-11T17:15:08.297

Last Modified

2024-11-21T05:56:09.363

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 3.3 (LOW)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:P/I:N/A:N

  • Access Vector: LOCAL
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: NONE
  • Availability Impact: NONE
Exploitability Score

3.9

Impact Score

2.9

Weaknesses
  • Type: Primary
    NVD-CWE-noinfo
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System amd epyc_7763_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7763 - No
Operating System amd epyc_7713p_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7713p - No
Operating System amd epyc_7713_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7713 - No
Operating System amd epyc_7663_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7663 - No
Operating System amd epyc_7643_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7643 - No
Operating System amd epyc_75f3_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_75f3 - No
Operating System amd epyc_7543p_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7543p - No
Operating System amd epyc_7543_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7543 - No
Operating System amd epyc_7513_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7513 - No
Operating System amd epyc_7453_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7453 - No
Operating System amd epyc_74f3_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_74f3 - No
Operating System amd epyc_7443p_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7443p - No
Operating System amd epyc_7443_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7443 - No
Operating System amd epyc_7413_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7413 - No
Operating System amd epyc_73f3_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_73f3 - No
Operating System amd epyc_7343_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7343 - No
Operating System amd epyc_7313p_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7313p - No
Operating System amd epyc_7313_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7313 - No
Operating System amd epyc_72f3_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_72f3 - No
Operating System amd epyc_7773x_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7773x - No
Operating System amd epyc_7473x_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7473x - No
Operating System amd epyc_7573x_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7573x - No
Operating System amd epyc_7373x_firmware < milanpi-sp3_1.0.0.7 Yes
Hardware amd epyc_7373x - No
Operating System amd epyc_7001_firmware < naplespi-sp3_1.0.0.h Yes
Hardware amd epyc_7001 - No
Operating System amd epyc_7251_firmware < naplespi-sp3_1.0.0.h Yes
Hardware amd epyc_7251 - No
Operating System amd epyc_7261_firmware < naplespi-sp3_1.0.0.h Yes
Hardware amd epyc_7261 - No
Operating System amd epyc_7281_firmware < naplespi-sp3_1.0.0.h Yes
Hardware amd epyc_7281 - No
Operating System amd epyc_7301_firmware < naplespi-sp3_1.0.0.h Yes
Hardware amd epyc_7301 - No
Operating System amd epyc_7351_firmware < naplespi-sp3_1.0.0.h Yes
Hardware amd epyc_7351 - No
Operating System amd epyc_7351p_firmware < naplespi-sp3_1.0.0.h Yes
Hardware amd epyc_7351p - No
Operating System amd epyc_7371_firmware < naplespi-sp3_1.0.0.h Yes
Hardware amd epyc_7371 - No
Operating System amd epyc_7401_firmware < naplespi-sp3_1.0.0.h Yes
Hardware amd epyc_7401 - No
Operating System amd epyc_7401p_firmware < naplespi-sp3_1.0.0.h Yes
Hardware amd epyc_7401p - No
Operating System amd epyc_7451_firmware < naplespi-sp3_1.0.0.h Yes
Hardware amd epyc_7451 - No
Operating System amd epyc_7501_firmware < naplespi-sp3_1.0.0.h Yes
Hardware amd epyc_7501 - No
Operating System amd epyc_7551_firmware < naplespi-sp3_1.0.0.h Yes
Hardware amd epyc_7551 - No
Operating System amd epyc_7551p_firmware < naplespi-sp3_1.0.0.h Yes
Hardware amd epyc_7551p - No
Operating System amd epyc_7601_firmware < naplespi-sp3_1.0.0.h Yes
Hardware amd epyc_7601 - No
References