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CVE-2021-38578

Published: 3 March 2022

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

Priority

Medium

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
edk2
Launchpad, Ubuntu, Debian
lunar Not vulnerable
(2022.11-6)
trusty Ignored
(end of standard support)
upstream Needs triage

xenial Needs triage

bionic Needed

focal Needed

impish Ignored
(end of life)
jammy Needed

kinetic Ignored
(end of life, was needed)
mantic Not vulnerable
(2023.02-2)
Patches:
upstream: https://github.com/tianocore/edk2/commit/cab1f02565d3b29081dd21afb074f35fdb4e1fd6

Severity score breakdown

Parameter Value
Base score 9.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H