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Fencer Intel
high 7.5

CVE-2021-26338 json

Improper access controls in System Management Unit (SMU) may allow for an attacker to override performance control tables located in DRAM r…

published 4y ago modified 4mo ago also EUVD-2021-13144

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits
0
none known

Summary

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.

Patch / fix

  • AMD 2nd Gen AMD EPYC™ RomePI-SP3_1.0.0.C
  • AMD 3rd Gen AMD EPYC™ MilanPI-SP3_1.0.0.4

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Exploit prediction

0.93% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C

Affected products

  • AMD 2nd Gen AMD EPYC™
  • AMD 3rd Gen AMD EPYC™

Classification

Weakness

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.