Medium [CVE-2026-88264] /dev/console symlink follow allows root-owned file creation outside the rootfs
This medium-severity Red Hat Linux advisory covers CVE-2026-88264 affecting Red Hat Hardened Images.
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Summary
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. Exploitation requires an OCI configuration that does not mount /dev, plus a malicious image.
Supported Red Hat container tooling mounts /dev by default. Red Hat products are not affected in supported configurations.
Red Hat severity: Moderate — CVSS 5.6 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N). Weakness: CWE-59.
Affected Red Hat products: Red Hat Hardened Images. Red Hat does not currently list a fixing RHSA for this CVE.
- 1.29.1
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- Always mount /dev (Podman/crun default). Do not run untrusted images with a /dev-less config.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
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