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Fencer Intel
high 7.5

CVE-2021-46794 json

Insufficient bounds checking in ASP (AMD Secure Processor) may allow for an out of bounds read in SMI (System Management Interface) mailbox…

published 3y ago modified 4mo ago also EUVD-2021-33450

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 49%
public exploits
0
none known

Summary

Insufficient bounds checking in ASP (AMD Secure Processor) may allow for an out of bounds read in SMI (System Management Interface) mailbox checksum calculation triggering a data abort, resulting in a potential denial of service.

Is CVE-2021-46794 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
yes
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.62% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • AMD Ryzen™ 2000 series Desktop Processors “Raven Ridge” AM4
  • AMD Ryzen™ 3000 Series Desktop Processors “Matisse” AM4
  • AMD AMD Ryzen™ 5000 Series Desktop Processors “Vermeer” AM4
  • AMD Ryzen™ 5000 Series Desktop processor with Radeon™ Graphics “Cezanne” AM4
  • AMD 3rd Gen AMD Ryzen™ Threadripper™ Processors “Castle Peak” HEDT
  • AMD Ryzen™ Threadripper™ PRO Processors “Castle Peak” WS
  • AMD Ryzen™ Threadripper™ PRO Processors “Chagall” WS
  • AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Dali”/”Dali” ULP
  • AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Pollock”
  • AMD Ryzen™ 2000 Series Mobile Processors “Raven Ridge” FP5
  • AMD Ryzen™ 3000 Series Mobile processor, 2nd Gen AMD Ryzen™ Mobile Processors with Radeon™ Graphics “Picasso”
  • AMD Ryzen™ 3000 Series Mobile Processors with Radeon™ Graphics “Renoir”
  • AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics “Lucienne”
  • AMD Ryzen™ 5000 Series Mobile processors with Radeon™ Graphics “Cezanne”

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.