Privilege escalation in Red Hat Hardened Images
CVE-2026-84042
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
Vulnerability class: Privilege Escalation
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.
Affected products
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
- secalert@redhat.com
Frequently asked questions
- What is CVE-2026-84042?
- CVE-2026-84042 is a high-severity vulnerability in Red Hat Hardened Images, classified under Improper Privilege Management. CVSS score: 7.8/10. Published 2026-09-10.
- How severe is CVE-2026-84042?
- High severity. CVSS v3 base score is 7.8 out of 10.