5.6 Medium

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

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.

CVSS 3.1 detail

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

Exploitable with local access to the machine, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector: Local
Attack complexity: High
Privileges required: Low
Interaction: None
Scope: Changed
Confidentiality: None
Integrity: High
Availability: None

Affected products and versions

Product	Affected versions	Fixed in
Red Hat Hardened Images 1.30	earliest → < 1.30-1.hum1	1.30-1.hum1
Red Hat Enterprise Linux 10	Versions not published
Red Hat Enterprise Linux 8	Versions not published
Red Hat Enterprise Linux 9	Versions not published
Red Hat OpenShift Container Platform 4	Versions not published
crun 1.29	earliest → 1.29.1	No fix stated
Red Hat OpenShift Container Platform 5	Versions not published

References

RHSA-2026:71668 access.redhat.com
access.redhat.com access.redhat.com
RHBZ#2531223 bugzilla.redhat.com
github.com github.com

Timeline

Published September 10, 2026
Last modified November 6, 2026

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