CVE-2026-84042

7.8 highEPSS 0.1%

High (7.8). EPSS 0.1% chance of exploitation in the next 30 days.

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

Severity

CVSS 3.1

7.8 high

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS: 0.1% chance of exploitation in the next 30 days; higher than 0% of CVEs (scores of 2026-10-31)
CWE: CWE-269
Published: 2026-09-10
Modified: 2026-09-15
Record from: the NVD, synced 2026-10-19

References

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

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