# CVE-2026-84042

## Summary

- **CVE ID:** CVE-2026-84042
- **Severity:** HIGH
- **CVSS Score:** 7.8 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H)
- **CWE:** CWE-269
- **Published:** Sep 10, 2026
- **Last Modified:** Sep 10, 2026

## 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

## Affected Products

No affected products listed.

## References

- [CNA](https://access.redhat.com/security/cve/CVE-2026-84042)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2531222)
- [CNA](https://github.com/containers/crun/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.10%
- **EPSS Percentile:** 0.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._