Vulnerability · Published Sep 10, 2026 · Assigned by redhat
CVE-2026-88264Crun: crun: /dev/console symlink follow allows root-owned file creation outside the rootfs
Medium 5.6
In plain English
A medium-severity security flaw in crun from containers. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | crun | 1.30.1-r0 | ALPINE-CVE-2026-88264 |
| Debian:12 | crun | no fix listed | DEBIAN-CVE-2026-88264 |
| Debian:13 | crun | no fix listed | DEBIAN-CVE-2026-88264 |
| Debian:14 | crun | no fix listed | DEBIAN-CVE-2026-88264 |
| Ubuntu:22.04:LTS | crun | no fix listed | UBUNTU-CVE-2026-88264 |
| Ubuntu:24.04:LTS | crun | no fix listed | UBUNTU-CVE-2026-88264 |
| Ubuntu:26.04:LTS | crun | no fix listed | UBUNTU-CVE-2026-88264 |
| Ubuntu:26.10 | crun | no fix listed | UBUNTU-CVE-2026-88264 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| containers | crun | 0 – through 1.29.1 |
| Red Hat | Red Hat Hardened Images | see references |
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
Weakness: CWE-59 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N
References
- RHSA-2026:71668 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-88264 vdb-entry, x_refsource_REDHAT
- RHBZ#2531223 issue-tracking, x_refsource_REDHAT
- https://github.com/containers/crun/