CVE-2021-27097 Code injection in n/a

High 7.8 Published 17 Feb 2021 Updated 3 Nov 2025

Attackers can execute arbitrary code by providing a modified FIT image to the U-Boot bootloader, compromising the device's boot process.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2021-27097?

CVE-2021-27097 is a high-severity code injection vulnerability in n/a, published on 17 Feb 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

The boot loader in Das U-Boot before 2021.04-rc2 mishandles a modified FIT.

Which versions are affected by CVE-2021-27097?

It affects 1 product.

Products include Denx U-Boot.

How do I fix CVE-2021-27097?

Upgrade to a fixed version.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2021-27097 being exploited?

There is no known exploitation of CVE-2021-27097 in the wild and no public exploit code.

Sources

Also known as ALPINE-CVE-2021-27097, DEBIAN-CVE-2021-27097, GHSA-3w66-96j7-fmcp, UBUNTU-CVE-2021-27097.