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Fencer Intel
high 7.9

CVE-2021-26383 json

Insufficient bounds checking in AMD TEE (Trusted Execution Environment) could allow an attacker with a compromised userspace to invoke a co…

published last yr. modified 4mo ago also EUVD-2021-13189

cvss
7.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 6%
public exploits
0
none known

Summary

Insufficient bounds checking in AMD TEE (Trusted Execution Environment) could allow an attacker with a compromised userspace to invoke a command with malformed arguments leading to out of bounds memory access, potentially resulting in loss of integrity or availability.

Patch / fix

  • AMD AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics CezannePI-FP6 1.0.0.6
  • AMD AMD Ryzen™ 4000 Series Desktop Processors ComboAM4v2 PI 1.2.0.5
  • AMD AMD Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics CezannePI-FP6 1.0.0.6
  • AMD AMD Ryzen™ 5000 Series Desktop Processors with Radeon™ Graphics ComboAM4v2 PI 1.2.0.5
  • AMD AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics RenoirPI-FP6 1.0.0.7
  • AMD AMD Ryzen™ Embedded V2000 Series Processors EmbeddedPI-FP6_1.0.0.6
  • AMD AMD Radeon™ RX 5000 Series Graphics Products AMD Software: Adrenalin Edition 23.2.1 (22.40.01.45)
  • AMD AMD Radeon™ RX 6000 Series Graphics Products AMD Software: Adrenalin Edition 23.2.1 (22.40.01.45)
  • AMD AMD Radeon™ PRO W5000 Series Graphics Products AMD Software: PRO Edition 23.Q1 (22.40.37.05)
  • AMD AMD Radeon™ PRO W6000 Series Graphics Products AMD Software: PRO Edition 23.Q1 (22.40.37.05)
  • AMD AMD Instinct™ MI210 ROCm 6.4
  • AMD AMD Instinct™ MI250 ROCm 6.4

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.9 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H

Affected products

  • AMD AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics
  • AMD AMD Ryzen™ 4000 Series Desktop Processors
  • AMD AMD Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics
  • AMD AMD Ryzen™ 5000 Series Desktop Processors with Radeon™ Graphics
  • AMD AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics
  • AMD AMD Ryzen™ Embedded V2000 Series Processors
  • AMD AMD Radeon™ RX 5000 Series Graphics Products
  • AMD AMD Radeon™ RX 6000 Series Graphics Products
  • AMD AMD Radeon™ PRO W5000 Series Graphics Products
  • AMD AMD Radeon™ PRO W6000 Series Graphics Products
  • AMD AMD Instinct™ MI210
  • AMD AMD Instinct™ MI250
  • AMD AMD Radeon™ PRO V520 Graphics Products
  • AMD AMD Radeon™ PRO V620 Graphics Products

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.