CVE-2021-26320

lowpriority · track · 22EPSS 0.002 · 8 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.19% (8th) EPSS

CVSS 2.1 · low

Is it mine?

60 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

Insufficient validation of the AMD SEV Signing Key (ASK) in the SEND_START command in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP

cvss

Technical severity, 0–10. One row per scoring source.

5.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 2.1–5.5

v2.02.1lowAV:L/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 3.9 · impact 2.9

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 3.6

v3.15.1mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-295USprimary

affected products (60)

Products and version ranges known to be affected.

AMD 1st Gen AMD EPYC™unspecified → NaplesPI-SP3_1.0.0.Genisa_euvdEU
AMD 2nd Gen AMD EPYC™unspecified → RomePI-SP3_1.0.0.Cenisa_euvdEU
AMD 3rd Gen AMD EPYC™unspecified → MilanPI-SP3_1.0.0.4enisa_euvdEU
amd epyc 7232p firmware< romepi-sp3_1.0.0.cnvdUScpe:2.3:o:amd:epyc_7232p_firmware:*:*:*:*:*:*:*:*
amd epyc 7251 firmware< naplespi-sp3_1.0.0.gnvdUScpe:2.3:o:amd:epyc_7251_firmware:*:*:*:*:*:*:*:*
amd epyc 7252 firmware< romepi-sp3_1.0.0.cnvdUScpe:2.3:o:amd:epyc_7252_firmware:*:*:*:*:*:*:*:*
amd epyc 7261 firmware< naplespi-sp3_1.0.0.gnvdUScpe:2.3:o:amd:epyc_7261_firmware:*:*:*:*:*:*:*:*
amd epyc 7262 firmware< romepi-sp3_1.0.0.cnvdUScpe:2.3:o:amd:epyc_7262_firmware:*:*:*:*:*:*:*:*
amd epyc 7272 firmware< romepi-sp3_1.0.0.cnvdUScpe:2.3:o:amd:epyc_7272_firmware:*:*:*:*:*:*:*:*
amd epyc 7281 firmware< naplespi-sp3_1.0.0.gnvdUScpe:2.3:o:amd:epyc_7281_firmware:*:*:*:*:*:*:*:*
amd epyc 7282 firmware< romepi-sp3_1.0.0.cnvdUScpe:2.3:o:amd:epyc_7282_firmware:*:*:*:*:*:*:*:*
amd epyc 72f3 firmware< milanpi-sp3_1.0.0.4nvdUScpe:2.3:o:amd:epyc_72f3_firmware:*:*:*:*:*:*:*:*
amd epyc 7301 firmware< naplespi-sp3_1.0.0.gnvdUScpe:2.3:o:amd:epyc_7301_firmware:*:*:*:*:*:*:*:*
amd epyc 7302 firmware< romepi-sp3_1.0.0.cnvdUScpe:2.3:o:amd:epyc_7302_firmware:*:*:*:*:*:*:*:*
amd epyc 7302p firmware< romepi-sp3_1.0.0.cnvdUScpe:2.3:o:amd:epyc_7302p_firmware:*:*:*:*:*:*:*:*
amd epyc 7313 firmware< milanpi-sp3_1.0.0.4nvdUScpe:2.3:o:amd:epyc_7313_firmware:*:*:*:*:*:*:*:*
amd epyc 7313p firmware< milanpi-sp3_1.0.0.4nvdUScpe:2.3:o:amd:epyc_7313p_firmware:*:*:*:*:*:*:*:*
amd epyc 7343 firmware< milanpi-sp3_1.0.0.4nvdUScpe:2.3:o:amd:epyc_7343_firmware:*:*:*:*:*:*:*:*
amd epyc 7351 firmware< naplespi-sp3_1.0.0.gnvdUScpe:2.3:o:amd:epyc_7351_firmware:*:*:*:*:*:*:*:*
amd epyc 7351p firmware< naplespi-sp3_1.0.0.gnvdUScpe:2.3:o:amd:epyc_7351p_firmware:*:*:*:*:*:*:*:*

showing 20 of 60

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2021-11-16modified 2026-06-17

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+1889 more

references (6)

External citations — patches, advisories, analysis.

scry

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