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

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.1 / Impact : 6.0

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

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

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-10 09:17

Updated : 2026-09-15 17:17

NVD link : CVE-2026-84042

Mitre link : CVE-2026-84042

CVE.ORG link : CVE-2026-84042

JSON object : View

Products Affected

No product.

CWE

CWE-269

Improper Privilege Management

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