{"id":"CVE-2026-47766","title":"crun is an open source OCI Container Runtime fully written in C","summary":"crun is an open source OCI Container Runtime fully written in C. Prior to version 1.28, crun's default device setup opens the container rootfs `/dev` directory without `O_NOFOLLOW`. If an OCI bundle contains `rootfs/dev` as a symlink and…","severity":"none","cwe":["CWE-61"],"published":"2026-08-14","updated":"2026-09-18","sourceUpdated":"2026-09-18T20:09:01.757","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-47766","references":[{"url":"https://github.com/containers/crun/releases/tag/1.28","label":"security-advisories@github.com"},{"url":"https://github.com/containers/crun/security/advisories/GHSA-7vwr-4279-7gq5","label":"security-advisories@github.com"}],"tags":["nvd"],"epss":0.00161,"epssPercentile":0.05711,"ingestedAt":"2026-09-18T20:51:25.615Z","slug":"CVE-2026-47766","body":"## Overview\n\ncrun is an open source OCI Container Runtime fully written in C. Prior to version 1.28, crun's default device setup opens the container rootfs `/dev` directory without `O_NOFOLLOW`. If an OCI bundle contains `rootfs/dev` as a symlink and the bundle configuration does not mount `/dev`, crun follows that symlink and creates the default device nodes and stdio symlinks at the symlink target outside the container rootfs. In a local rootful crun replay, this created fixed device nodes and symlinks outside the rootfs before crun returned failure. A pre-existing file named `ptmx` in the target directory was also replaced by crun's forced `ptmx -> pts/ptmx` symlink. Version 1.28 fixes the issue.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}