CVE-2021-38578

Description

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

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

References

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