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Red Hat: CVE-2021-38578: integer underflow in SmmEntryPoint function leads to potential SMM privilege escalation (Multiple Advisories)

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Red Hat: CVE-2021-38578: integer underflow in SmmEntryPoint function leads to potential SMM privilege escalation (Multiple Advisories)

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:P/I:P/A:P)
Published
03/03/2022
Created
05/15/2023
Added
05/15/2023
Modified
08/07/2024

Description

Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize.

Solution(s)

  • redhat-upgrade-edk2-aarch64
  • redhat-upgrade-edk2-debugsource
  • redhat-upgrade-edk2-ovmf
  • redhat-upgrade-edk2-tools
  • redhat-upgrade-edk2-tools-debuginfo
  • redhat-upgrade-edk2-tools-doc

References

  • CVE-2021-38578
  • RHSA-2023:2165

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