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Debian 11: u-boot Critical DLA-4320-1 Update CVE-2021-27097

debian lts
Calendar Grey September 30, 2025
Dist Debian Esm H88
Critical security update for u-boot in Debian addresses multiple risks including buffer overflow. Upgrade recommended.
Multiple vulnerabilties were discovered in u-boot, a boot loader for embedded systems
Topics%20covered

Topics Covered

security advisory buffer overflow critical debian embedded systems u-boot

Summary

CVE-2021-27097

Strange modifications of the FIT can introduce security risks.

CVE-2021-27138

Using unit addresses in a FIT can pose security risks.

For Debian 11 bullseye, these problems have been fixed in version
2021.01+dfsg-5+deb11u2.

We recommend that you upgrade your u-boot packages.

For the detailed security status of u-boot please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/u-boot

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS


Severity
critical
Lowest
Low
Medium
High
Critical

Package: u-boot
Version: 2021.01+dfsg-5+deb11u2
CVE ID: CVE-2021-27097 CVE-2021-27138
Debian Bug: 983269 983270

Topics%20covered

Topics Covered

security advisory buffer overflow critical debian embedded systems u-boot

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