Alerts This Week
Warning Icon 1 933
Alerts This Week
Warning Icon 1 933

Fedora 42 docker-buildx Critical Improper Certificate Valid 2026-95f37c21d5

fedora
Calendar Grey May 23, 2026
Dist Fedora Esm H88
Critical update for Fedora 42 docker-buildx fixes improper certificate validation, addressing CVE-2026-39984.
Update to release v0.34.0 Resolves: rhbz#2467576 Resolves CVE-2026-39984: rhbz#2458930 Upstream new features and fixes

Summary

Docker CLI plugin for extended build capabilities with BuildKit.

Update Information:

Update to release v0.34.0 Resolves: rhbz#2467576 Resolves CVE-2026-39984: rhbz#2458930 Upstream new features and fixes

Topics%20covered

Topics Covered

security advisory fedora critical DoS docker-buildx improper certificate validation

Change Log

* Wed May 13 2026 Bradley G Smith - 0.34.0-1 - Update to release v0.34.0 - Resolves: rhbz#2467576 - Resolves CVE-2026-39984: rhbz#2458930 - Upstream new features and fixes * Thu Apr 2 2026 Bradley G Smith - 0.33.0-2 - Update to new spec file - Regenerate spec file using go2rpm - Use gocheck2. Current v0.33.0 release will sometimes fail during check phase with an https related test. No obvious pattern related to architecture. gocheck2 will allow for test to be skipped if needed

References


[ 1 ] Bug #2458930 - CVE-2026-39984 docker-buildx: improper certificate validation in verifier [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2458930 [ 2 ] Bug #2467576 - docker-buildx-0.34.0 is available https://bugzilla.redhat.com/show_bug.cgi?id=2467576

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-95f37c21d5' 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
critical
Lowest
Low
Medium
High
Critical

Name: docker-buildx
Product: Fedora 42
Version: 0.34.0
Release: 1.fc42
URL: https://github.com/docker/buildx
Summary: Docker CLI plugin for extended build capabilities with BuildKit

Topics%20covered

Topics Covered

security advisory fedora critical DoS docker-buildx improper certificate validation

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here