CVE-2021-26342

Advisory lineage Upstream: 0 Downstream: 5
Modified
Published: 11 May 2022, 16:21
Last modified:16 Sept 2024, 16:32

Vulnerability Summary

Overall Risk (default)
low
13/100
CVSS Score
3.3 LOW
v3.1 (nvd)
EPSS Score
0.05% LOW
0% probability -0.07%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

11 May 2022, 16:21
Published
Vulnerability first disclosed
16 Sept 2024, 16:32
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•LOW•Score: 3.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
  • v2.0•LOW•Score: 2.1AV:L/AC:L/Au:N/C:P/I:N/A:N

EPSS Trends

Current EPSS score: 0.05%• Percentile: 17%

Affected Systems

  • amd•epyc_7001_firmware

    < naplespi-sp3_1.0.0.h

  • amd•epyc_7251_firmware

    < naplespi-sp3_1.0.0.h

  • amd•epyc_7261_firmware

    < naplespi-sp3_1.0.0.h

  • amd•epyc_7281_firmware

    < naplespi-sp3_1.0.0.h

  • amd•epyc_72f3_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7301_firmware

    < naplespi-sp3_1.0.0.h

  • amd•epyc_7313_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7313p_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7343_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7351_firmware

    < naplespi-sp3_1.0.0.h

  • amd•epyc_7351p_firmware

    < naplespi-sp3_1.0.0.h

  • amd•epyc_7371_firmware

    < naplespi-sp3_1.0.0.h

  • amd•epyc_7373x_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_73f3_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7401_firmware

    < naplespi-sp3_1.0.0.h

  • amd•epyc_7401p_firmware

    < naplespi-sp3_1.0.0.h

  • amd•epyc_7413_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7443_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7443p_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7451_firmware

    < naplespi-sp3_1.0.0.h

  • amd•epyc_7453_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7473x_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_74f3_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7501_firmware

    < naplespi-sp3_1.0.0.h

  • amd•epyc_7513_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7543_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7543p_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7551_firmware

    < naplespi-sp3_1.0.0.h

  • amd•epyc_7551p_firmware

    < naplespi-sp3_1.0.0.h

  • amd•epyc_7573x_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_75f3_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7601_firmware

    < naplespi-sp3_1.0.0.h

  • amd•epyc_7643_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7663_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7713_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7713p_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7763_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc_7773x_firmware

    < milanpi-sp3_1.0.0.7

  • amd•epyc™ processors

    various

References (1)