Vulnerability · Published Mar 3, 2022 · Assigned by TianoCore
CVE-2021-38578
High 7.4
In plain English
A high-severity security flaw in EDK II from TianoCore. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 64% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.4High
Exploit odds (30 days)1.0%top 36.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:9 | edk2-aarch64 | 20221207gitfff6d81270b5-9.el9_2 | ALSA-2023:2165 |
| AlmaLinux:9 | edk2-ovmf | 20221207gitfff6d81270b5-9.el9_2 | ALSA-2023:2165 |
| AlmaLinux:9 | edk2-tools | 20221207gitfff6d81270b5-9.el9_2 | ALSA-2023:2165 |
| AlmaLinux:9 | edk2-tools-doc | 20221207gitfff6d81270b5-9.el9_2 | ALSA-2023:2165 |
| Debian:12 | edk2 | 2022.11-1 | DEBIAN-CVE-2021-38578 |
| Debian:13 | edk2 | 2022.11-1 | DEBIAN-CVE-2021-38578 |
| Debian:14 | edk2 | 2022.11-1 | DEBIAN-CVE-2021-38578 |
| Ubuntu:22.04:LTS | edk2 | 2022.02-3ubuntu0.22.04.3 | UBUNTU-CVE-2021-38578 |
| Ubuntu:22.04:LTS | edk2 | 2022.02-3ubuntu0.22.04.3 | USN-7060-1 |
Affected products (as reported)
Weakness: CWE-124 · Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L