CVE-2021-38578 Integer overflow in EDK II
An integer underflow in EDK II SmmEntryPoint allows attackers to bypass buffer checks, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-38578?
CVE-2021-38578 is a high-severity vulnerability in TianoCore EDK II, published on 3 Mar 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize.
Which versions are affected by CVE-2021-38578?
It affects 2 products.
Linux distribution packages (1)
ovmf openSUSE:Tumbleweed | All versions | 202211-1.1 |
Products include Insyde Kernel, Tianocore Edk2.
How do I fix CVE-2021-38578?
Apply the vendor's patch.
Is CVE-2021-38578 being exploited?
There is no known exploitation of CVE-2021-38578 in the wild and no public exploit code.
Other vulnerabilities in TianoCore EDK II
Sources
Also known as DEBIAN-CVE-2021-38578, GHSA-grqq-3jqg-g95p, OESA-2022-2122, UBUNTU-CVE-2021-38578, openSUSE-SU-2024:12542-1.