Red HatCVE-2026-84042
Red Hat crun.: improper privilege management
High7.8CVE-2026-84042 · Published Sep 10, 2026 · updated Sep 15, 2026
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 8 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 9 Product | all versions | No fix yet |
| Red Hat Hardened Images Product | all versions | No fix yet |
| Red Hat OpenShift Container Platform 4 Product | all versions | No fix yet |
| all versions | No fix yet | |
| all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-269
More Red Hat advisories
All Red Hat| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 10 | Red Hat admin backend of gvfs: race condition | High7.0 | 1.62.0+2 more |
| Sep 10 | Red Hat Enterprise Linux 10: insecure permissions | Medium6.5 | No fix yet |
| Sep 10 | A flaw was found in Evolution | Medium6.3 | No fix yet |
| Sep 10 | Red Hat crun.: link following | Medium5.6 | No fix yet |
| Sep 10 | Red Hat crun. After pivot_root: link following | Medium5.6 | No fix yet |
| Sep 10 | Red Hat Service Interconnect 2: denial of service | Medium5.9 | No fix yet |