# CVE-2026-88264: Crun: crun: /dev/console symlink follow allows root-owned file creation outside the rootfs

Status: published. Published: 2026-09-10. Updated: 2026-11-06.

A flaw was found in crun. When the container configuration does not give /dev a dedicated mount, terminal setup can redirect /dev/console onto an attacker-controlled path, including via the read-only-rootfs bind-mount fallback. Affected versions are crun 1.29.1 and earlier. Default configurations that mount a fresh /dev are not exposed. No fixed release is available yet.

## Remediation

- workaround: Always mount /dev (Podman/crun default). Do not run untrusted images with a /dev-less config. (source: CNA: redhat)

## Affected products and versions

- containers / crun (crun): ≥ 0; ≤ 1.29.1 (affected, semver). Source: CNA: redhat
- Red Hat / Red Hat Hardened Images (crun-main): ≥ 1.30-1.hum1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (crun): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (container-tools:rhel8/crun): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (crun): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4 (crun): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4 (openshift/ose-rhel-coreos-8): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4 (openshift/ose-rhel-coreos-9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 5 (openshift/ose-rhel-coreos-9): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 5.6 (medium); CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 0.12% as of 2026-11-05; percentile 1.93%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-59

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/errata/RHSA-2026:71668 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2026-88264 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2531223 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://github.com/containers/crun/ (CNA: redhat)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-88264; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-88264; retrieved 2026-11-06; source updated Not reported

Revision: 47ff4187407dc2cca49f9e821fadf8f161f8170f1ea20671c591a0ca6db4fdb1

Canonical: https://y2.dev/cve/CVE-2026-88264

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