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Fencer Intel
medium 4.1

CVE-2021-26377 json

Insufficient parameter validation while allocating process space in the Trusted OS (TOS) may allow for a malicious userspace process to tri…

published last yr. modified 4mo ago also EUVD-2021-13183

cvss
4.1
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 4%
public exploits
0
none known

Summary

Insufficient parameter validation while allocating process space in the Trusted OS (TOS) may allow for a malicious userspace process to trigger an integer overflow, leading to a potential denial of service.

Patch / fix

  • AMD AMD Ryzen™ 5000 Series Processors with Radeon™ Graphics CezannePI-FP6 1.0.0.8
  • AMD AMD Ryzen™ Threadripper™ 3000 Series Processors CastlePeakPI-SP3r3 1.0.0.7
  • AMD AMD Ryzen™ Threadripper™ PRO 3000WX Series Processors CastlePeakWSPI-sWRX8 1.0.0.9
  • AMD AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics CezannePI-FP6 1.0.0.8
  • AMD AMD Ryzen™ Threadripper™ PRO 5000 WX-Series Processors ChagallWSPI-sWRX8 1.0.0.2
  • AMD AMD Ryzen™ 5000 Series Desktop Processors ComboAM4 V2 PI 1.2.0.8, ComboAM4v2 PI 1.2.0.5
  • AMD AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics PicassoPI-FP5 1.0.0.E, PollockPI-FT5 1.0.0.4
  • AMD AMD Ryzen™ 3000 Series Desktop Processors ComboAM4PI 1.0.0.9/ ComboAM4 V2 PI 1.2.0.8
  • AMD AMD Ryzen™ 7030 Series Mobile processors with Radeon™ Graphics CezannePI-FP6 1.0.0.8
  • AMD AMD Ryzen™ 4000 Series Desktop Processors ComboAM4v2 PI 1.2.0.5
  • AMD AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics RenoirPI-FP6 1.0.0.8
  • AMD AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics RembrandtPI-FP7_0.0.8.0 RC1
  • AMD AMD Ryzen™ Embedded R1000 Series Processors EmbeddedPI-FP5_1.2.0.A
  • AMD AMD Ryzen™ Embedded R2000 Series Processors EmbeddedR2KPI-FP5_1.0.0.2
  • AMD AMD Ryzen™ Embedded 5000 Series Processors EmbAM4PI 1.0.0.2
  • AMD AMD Ryzen™ Embedded V1000 Series Processors EmbeddedPI-FP5_1.2.0.A
  • AMD AMD Ryzen™ Embedded V2000 Series Processors EmbeddedPI-FP6_1.0.0.6
  • AMD AMD Ryzen™ Embedded V3000 Series Processors EmbeddedPI-FP7r2_1000
  • AMD AMD Radeon™ RX 5000 Series Graphics Products AMD Software: Adrenalin Edition 24.7.1 (24.10.29.01), AMD Software: PRO Edition 24.Q2 (24.10.20)
  • AMD AMD Radeon™ PRO W5000 Series Graphics Products AMD Software: PRO Edition 24.Q2 (24.10.20)
  • AMD AMD Radeon™ RX 6000 Series Graphics Products AMD Software: Adrenalin Edition 24.7.1 (24.10.29.01), AMD Software: PRO Edition 24.Q2 (24.10.20)
  • AMD AMD Radeon™ PRO W6000 Series Graphics Products AMD Software: PRO Edition 24.Q2 (24.10.20)

Is CVE-2021-26377 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 4.1 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

Affected products

  • AMD AMD Ryzen™ 5000 Series Processors with Radeon™ Graphics
  • AMD AMD Ryzen™ Threadripper™ 3000 Series Processors
  • AMD AMD Ryzen™ Threadripper™ PRO 3000WX Series Processors
  • AMD AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics
  • AMD AMD Ryzen™ Threadripper™ PRO 5000 WX-Series Processors
  • AMD AMD Ryzen™ 5000 Series Desktop Processors
  • AMD AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics
  • AMD AMD Ryzen™ 3000 Series Desktop Processors
  • AMD AMD Ryzen™ 7030 Series Mobile processors with Radeon™ Graphics
  • AMD AMD Ryzen™ 4000 Series Desktop Processors
  • AMD AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics
  • AMD AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics
  • AMD AMD Ryzen™ Embedded R1000 Series Processors
  • AMD AMD Ryzen™ Embedded R2000 Series Processors
  • AMD AMD Ryzen™ Embedded 5000 Series Processors
  • AMD AMD Ryzen™ Embedded V1000 Series Processors
  • AMD AMD Ryzen™ Embedded V2000 Series Processors
  • AMD AMD Ryzen™ Embedded V3000 Series Processors
  • AMD AMD Radeon™ RX 5000 Series Graphics Products
  • AMD AMD Radeon™ PRO W5000 Series Graphics Products
  • AMD AMD Radeon™ RX 6000 Series Graphics Products
  • AMD AMD Radeon™ PRO W6000 Series Graphics Products
  • AMD AMD Radeon™ Instinct™ MI25 Graphics Products
  • AMD AMD Radeon™ PRO V520 Graphics Products
  • AMD AMD Radeon™ PRO V620 Graphics Products

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

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.