VULNERABILITY INTELLIGENCE
CVE-2021-38578
CVSS score7.4 HIGH
EPSS probability1.02%
CISA KEVNot currently listed
Published2022-03-03
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L
Description
Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize.
Weakness classification
- CWE-124: Buffer Underwrite ('Buffer Underflow')
- CWE-787: Out-of-bounds Write
Primary references
- infosec@edk2.groups.io — Issue Tracking, Vendor Advisory
- infosec@edk2.groups.io — Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Issue Tracking, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory