CVE-2021-26331
AMD System Management Unit (SMU) contains a potential issue where a malicious user may be able to...
CVE-2021-26331 is a high vulnerability (CVSS 7.8) 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 0.29%, the 22nd percentile. No source names a fixed version.
- Severity
- 7.8 HighCVSS 3.1, NVD
- Exploit chance
- 0.29%EPSS, 22nd percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
AMD System Management Unit (SMU) contains a potential issue where a malicious user may be able to manipulate mailbox entries leading to arbitrary code execution.
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
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
Affected products
- amd 1st gen amd epyc™
- amd 2nd gen amd epyc™
- amd 3rd gen amd epyc™
- amd epyc 7001 firmware
- amd epyc 7002 firmware
- amd epyc 7003 firmware
- amd epyc 7232p firmware
- amd epyc 7251 firmware
- amd epyc 7252 firmware
- amd epyc 7262 firmware
- amd epyc 7272 firmware
- amd epyc 7281 firmware
Show 49 moreShow less
- amd epyc 7282 firmware
- amd epyc 72f3 firmware
- 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 73f3 firmware
- amd epyc 7401 firmware
- amd epyc 7401p 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
What each source reports
NVD Score used
AMD System Management Unit (SMU) contains a potential issue where a malicious user may be able to manipulate mailbox entries leading to arbitrary code execution.
- Record
CVE-2021-26331- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.2 High
AV:L/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-20
- Updated
- 2026-11-02
CVE ListNo score
AMD System Management Unit (SMU) contains a potential issue where a malicious user may be able to manipulate mailbox entries leading to arbitrary code execution.
- Record
CVE-2021-26331- Weakness
- CWE-20
- Updated
- 2026-11-02
EUVDEUVD-2021-13137No score
AMD System Management Unit (SMU) contains a potential issue where a malicious user may be able to manipulate mailbox entries leading to arbitrary code execution.
- Record
EUVD-2021-13137- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-945g-xqmp-7xg3No score
AMD System Management Unit (SMU) contains a potential issue where a malicious user may be able to...
AMD System Management Unit (SMU) contains a potential issue where a malicious user may be able to manipulate mailbox entries leading to arbitrary code execution.
- Record
GHSA-945g-xqmp-7xg3- Updated
- 2026-11-02
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.