What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-10 · updated 2026-09-25
• Weakness: CWE-59

Description

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.

Affected products

• containers crun: through 1.29.1
• Red Hat OpenShift Container Platform 4.18: all versions
• Red Hat Enterprise Linux 10: all versions
• Red Hat Enterprise Linux 8: all versions
• Red Hat Enterprise Linux 9: all versions
• Red Hat Hardened Images: all versions — fixed in 1.30-1.hum1

How to fix

Upgrade to a fixed version: Red Hat Hardened Images 1.30-1.hum1. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2026:71668
• https://access.redhat.com/security/cve/CVE-2026-88264
• https://bugzilla.redhat.com/show_bug.cgi?id=2531223
• https://github.com/containers/crun/

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