CVE-2021-38578
9.8
CRITICAL
CVSS 3.1
EPSS 0.06%
Description
Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize.
How to fix CVE-2021-38578
To remediate CVE-2021-38578, upgrade the affected package to a fixed version below.
- Debian/edk2—upgrade to 2020.11-2+deb11u3 or later
Is CVE-2021-38578 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 2020.11-2+deb11u3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |