CVE-2021-26338
Improper access controls in System Management Unit (SMU) may allow for an attacker to override...
Improper access controls in System Management Unit (SMU) may allow for an attacker to override performance control tables located in DRAM resulting in a potential lack of system resources.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Improper access controls in System Management Unit (SMU) may allow for an attacker to override performance control tables located in DRAM resulting in a potential lack of system resources.
- Record
CVE-2021-26338- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 7.8 High
AV:N/AC:L/Au:N/C:N/I:N/A:C - Weakness
- CWE-284
- Updated
- 2026-11-02
CVE ListNo score
Improper access controls in System Management Unit (SMU) may allow for an attacker to override performance control tables located in DRAM resulting in a potential lack of system resources.
- Record
CVE-2021-26338- Weakness
- CWE-284
- Updated
- 2026-11-02
EUVDEUVD-2021-13144No score
Improper access controls in System Management Unit (SMU) may allow for an attacker to override performance control tables located in DRAM resulting in a potential lack of system resources.
- Record
EUVD-2021-13144- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-42wg-wpqj-99fc
Improper access controls in System Management Unit (SMU) may allow for an attacker to override...
Improper access controls in System Management Unit (SMU) may allow for an attacker to override performance control tables located in DRAM resulting in a potential lack of system resources.
- Record
GHSA-42wg-wpqj-99fc- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
- amd 2nd gen amd epyc™
- amd 3rd gen amd epyc™
- amd epyc 7232p firmware
- amd epyc 7252 firmware
- amd epyc 7262 firmware
- amd epyc 7272 firmware
- amd epyc 7282 firmware
- amd epyc 72f3 firmware
- amd epyc 7302 firmware
- amd epyc 7302p firmware
- amd epyc 7313 firmware
- amd epyc 7313p firmware
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- amd epyc 7343 firmware
- amd epyc 7352 firmware
- amd epyc 73f3 firmware
- amd epyc 7402 firmware
- amd epyc 7402p firmware
- amd epyc 7413 firmware
- amd epyc 7443 firmware
- amd epyc 7443p firmware
- amd epyc 7452 firmware
- amd epyc 7453 firmware
- amd epyc 74f3 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 7552 firmware
- amd epyc 75f3 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-2021-26338 is a high vulnerability (CVSS 7.5) in Amd 2nd 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 0.93%, the 60th percentile. No source names a fixed version.