CVE-2021-38578

Description

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

Affected Platforms

Weakness Type

CWE-124, CWE-787

References

• https://bugzilla.tianocore.org/show_bug.cgi?id=3387
• https://www.insyde.com/security-pledge/SA-2023024
• https://bugzilla.tianocore.org/show_bug.cgi?id=3387
• https://lists.debian.org/debian-lts-announce/2025/06/msg00007.html
• https://www.insyde.com/security-pledge/SA-2023024