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Fencer Intel
medium 5.5

CVE-2020-12966 json

AMD EPYC™ Processors contain an information disclosure vulnerability in the Secure Encrypted Virtualization with Encrypted State (SEV-ES) a…

published 4y ago modified 4mo ago also EUVD-2020-5246

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits
0
none known

Summary

AMD EPYC™ Processors contain an information disclosure vulnerability in the Secure Encrypted Virtualization with Encrypted State (SEV-ES) and Secure Encrypted Virtualization with Secure Nested Paging (SEV-SNP). A local authenticated attacker could potentially exploit this vulnerability leading to leaking guest data by the malicious hypervisor.

Patch / fix

  • amd epyc_7763_firmware milanpi-sp3_1.0.0.5
  • amd epyc_7713p_firmware milanpi-sp3_1.0.0.5
  • amd epyc_7713_firmware milanpi-sp3_1.0.0.5
  • amd epyc_7663_firmware milanpi-sp3_1.0.0.5
  • amd epyc_7643_firmware milanpi-sp3_1.0.0.5
  • amd epyc_75f3_firmware milanpi-sp3_1.0.0.5
  • amd epyc_7543p_firmware milanpi-sp3_1.0.0.5
  • amd epyc_7543_firmware milanpi-sp3_1.0.0.5
  • amd epyc_7513_firmware milanpi-sp3_1.0.0.5
  • amd epyc_74f3_firmware milanpi-sp3_1.0.0.5
  • amd epyc_7453_firmware milanpi-sp3_1.0.0.5
  • amd epyc_7443p_firmware milanpi-sp3_1.0.0.5
  • amd epyc_7443_firmware milanpi-sp3_1.0.0.5
  • amd epyc_7413_firmware milanpi-sp3_1.0.0.5
  • amd epyc_73f3_firmware milanpi-sp3_1.0.0.5
  • amd epyc_7343_firmware milanpi-sp3_1.0.0.5
  • amd epyc_7313p_firmware milanpi-sp3_1.0.0.5
  • amd epyc_7313_firmware milanpi-sp3_1.0.0.5
  • amd epyc_72f3_firmware milanpi-sp3_1.0.0.5
  • amd epyc_7003_firmware milanpi-sp3_1.0.0.5

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Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:P/I:N/A:N

Affected products

  • AMD 1st/2nd/3rd Gen AMD EPYC™ Processors

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.