CVE-2026-84042

Description

A flaw was found in crun. When crun is built with libkrun and a container is started rootful with passt networking (krun.use_passt), crun can execute attacker-controlled payload from the container image with host root privileges. The issue is a regression in crun 1.29. It affects crun >= 1.29

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Produits concernés

• Red Hat Enterprise Linux 10
• Red Hat Enterprise Linux 8
• Red Hat Enterprise Linux 9
• Red Hat Hardened Images
• Red Hat OpenShift Container Platform 4

Scores CVSS

Faiblesses (CWE)

• CWE-269

Références

• https://access.redhat.com/security/cve/CVE-2026-84042
• https://bugzilla.redhat.com/show_bug.cgi?id=2531222
• https://github.com/containers/crun/

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories