CVE-2021-26320
Insufficient validation of the AMD SEV Signing Key (ASK) in the SEND_START command in the SEV...
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
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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
- Record
CVE-2021-26320- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 2.1 Low
AV:L/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-295
- Updated
- 2026-11-02
CVE List No score
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
- Record
CVE-2021-26320- Weakness
- CWE-295
- Updated
- 2026-11-02
EUVDEUVD-2021-13126 No score
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
- Record
EUVD-2021-13126- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-v3rf-32hp-hfhf No score
Insufficient validation of the AMD SEV Signing Key (ASK) in the SEND_START command in the SEV...
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
- Record
GHSA-v3rf-32hp-hfhf- Weakness
- CWE-295
- Updated
- 2026-11-02
Affected products
- amd 1st gen amd epyc™
- amd 2nd gen amd epyc™
- amd 3rd gen amd epyc™
- amd epyc 7232p firmware
- amd epyc 7251 firmware
- amd epyc 7252 firmware
- amd epyc 7261 firmware
- amd epyc 7262 firmware
- amd epyc 7272 firmware
- amd epyc 7281 firmware
- amd epyc 7282 firmware
- amd epyc 72f3 firmware
Show 48 moreShow less
- amd epyc 7301 firmware
- amd epyc 7302 firmware
- amd epyc 7302p firmware
- amd epyc 7313 firmware
- amd epyc 7313p firmware
- amd epyc 7343 firmware
- amd epyc 7351 firmware
- amd epyc 7351p firmware
- amd epyc 7352 firmware
- amd epyc 7371 firmware
- amd epyc 73f3 firmware
- amd epyc 7401 firmware
- amd epyc 7402 firmware
- amd epyc 7402p firmware
- amd epyc 7413 firmware
- amd epyc 7443 firmware
- amd epyc 7443p firmware
- amd epyc 7451 firmware
- amd epyc 7452 firmware
- amd epyc 7453 firmware
- amd epyc 74f3 firmware
- amd epyc 7501 firmware
- amd epyc 7502 firmware
- amd epyc 7502p firmware
- amd epyc 7513 firmware
- amd epyc 7532 firmware
- amd epyc 7542 firmware
- amd epyc 7543 firmware
- amd epyc 7543p firmware
- amd epyc 7551 firmware
- amd epyc 7551p firmware
- amd epyc 7552 firmware
- amd epyc 75f3 firmware
- amd epyc 7601 firmware
- amd epyc 7642 firmware
- amd epyc 7643 firmware
- amd epyc 7662 firmware
- amd epyc 7663 firmware
- amd epyc 7702 firmware
- amd epyc 7702p firmware
- amd epyc 7713 firmware
- amd epyc 7713p firmware
- amd epyc 7742 firmware
- amd epyc 7763 firmware
- amd epyc 7f32 firmware
- amd epyc 7f52 firmware
- amd epyc 7f72 firmware
- amd epyc 7h12 firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-26320 is a medium vulnerability (CVSS 5.5) in Amd 1st Gen Amd Epyc™, published November 16, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.19%, the 8th percentile. No source names a fixed version.