{
  "claim": {
    "argus_claim_ref": null,
    "attacker_control": null,
    "claimed_surface": "cli_local",
    "expected_impact": null,
    "finding_id": null,
    "id": null,
    "required_entrypoint_detail": null,
    "required_entrypoint_kind": "cli_command",
    "submission_reason": "ticket_derived",
    "trigger_class": "cli_entrypoint",
    "upstream_verdicts": null
  },
  "latest_description": "runc is a CLI tool for spawning and running containers according to the OCI specification. In versions prior to 1.3.6, 1.4.0-rc.1 through 1.4.3, and 1.5.0-rc.1 through 1.5.0-rc.3, when setting up the container rootfs, setupPtmx and setupDevSymlinks call os.Remove and os.Symlink with a filepath.Join string which allow an image with /dev as a symlink to trick runc into deleting files called ptmx on the host or creating a hardcoded set of symlinks with specific names and targets in an arbitrary pre-existing host directory. This issue is not exploitable under Docker, but affects other Linux container tooling whose higher-level runtimes are built on runc. Fixed in versions 1.3.6, 1.4.3 and 1.5.0.",
  "product": "opencontainers/runc",
  "severity": "low",
  "status": "open",
  "summary": "runc symlink deletion via malicious /dev symlink in container image",
  "ticket_id": "CVE-2026-41579"
}