CVE-2021-38578 (GCVE-0-2021-38578)

Vulnerability from cvelistv5 – Published: 2022-03-03 21:53 – Updated: 2025-11-03 19:26
VLAI
Summary
Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize.
Severity
7.4 (High)
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-124 - A case of CWE-124 is occurring in PiSmmCore.
Assigner
References
Impacted products
Vendor Product Version
TianoCore EDK II Affected: edk2-stable202208
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.