Debian 13.6 security update patches over a hundred advisories in trixie

Help Net Security

July 12, 2026 at 10:25 PM

Overview

Debian has released version 13.6, also known as 'trixie,' to address over a hundred security advisories, including a significant issue with UEFI Secure Boot. Most PCs rely on a Secure Boot certificate authority that has expired, which can prevent machines from booting properly when Secure Boot is enabled. This update includes a fix through the firmware update tool, fwupd, which has been upgraded to handle the expired certificate. Users running Debian 13.6 need to install this update to ensure their systems remain secure and functional. This release emphasizes the importance of keeping system software up to date to mitigate potential security risks.

Key Takeaways

Affected Systems: Debian 13.6 (trixie), UEFI Secure Boot
Action Required: Update to Debian 13.
Timeline: Newly disclosed

Original Article Summary

Most PCs still run with a UEFI Secure Boot certificate authority, installed by default since 2013, that has now expired. That certificate signed the bootloaders letting machines start with Secure Boot turned on. Its expiry sits at the center of the sixth update to Debian 13, codenamed “trixie.” The point release carries mostly security corrections along with a few fixes for serious problems. The Secure Boot problem gets handled through fwupd, updated to upstream version … More → The post Debian 13.6 security update patches over a hundred advisories in trixie appeared first on Help Net Security.

Impact

Debian 13.6 (trixie), UEFI Secure Boot

Exploitation Status

No active exploitation has been reported at this time. However, organizations should still apply patches promptly as proof-of-concept code may exist.

Timeline

Newly disclosed

Remediation

Update to Debian 13.6 and ensure fwupd is upgraded to the latest version.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Update, Debian.

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