CVE-2026-88264 Crun: crun: /dev/console symlink follow allows root-owned file creation outside the rootfs
Attackers can create root-owned files outside the container rootfs via symlink following in /dev/console, requiring non-default container configurations.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-88264?
CVE-2026-88264 is a medium-severity path traversal vulnerability in Red Hat Enterprise Linux 10, published on 10 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-59
Which versions are affected by CVE-2026-88264?
How do I fix CVE-2026-88264?
No fix published yet.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-88264 being exploited?
There is no known exploitation of CVE-2026-88264 in the wild and no public exploit code.
Sources
Also known as AZL-101099, BELL-CVE-2026-88264, DEBIAN-CVE-2026-88264, GHSA-ppgw-cqj8-9qrg, UBUNTU-CVE-2026-88264.