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Fedora 42 docker-buildkit Vulnerable to CVE-2026-39984 Certificate Issues

fedora
Calendar Grey May 23, 2026
Dist Fedora Esm H88
Critical update for Fedora 42 docker-buildkit resolves CVE-2026-39984 improper certificate validation issue.
Update to release v0.30.0 Resolves CVE-2026-39984: rhbz#2458929 Upstream new features and fixes

Summary

Concurrent, cache-efficient, and Dockerfile-agnostic builder toolkit.

Update Information:

Update to release v0.30.0 Resolves CVE-2026-39984: rhbz#2458929 Upstream new features and fixes

Topics%20covered

Topics Covered

security advisory fedora remote exploit important improper validation docker-buildkit

Change Log

* Wed May 13 2026 Bradley G Smith - 0.30.0-1 - Update to release v0.30.0 - Resolves CVE-2026-39984: rhbz#2458929 - Upstream new features and fixes

References


[ 1 ] Bug #2458929 - CVE-2026-39984 docker-buildkit: improper certificate validation in verifier [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2458929

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-0adc4a8098' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

Severity
important
Lowest
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Critical

Name: docker-buildkit
Product: Fedora 42
Version: 0.30.0
Release: 1.fc42
URL: https://github.com/moby/buildkit
Summary: Concurrent, cache-efficient, and Dockerfile-agnostic builder toolkit

Topics%20covered

Topics Covered

security advisory fedora remote exploit important improper validation docker-buildkit

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