{"id":"DEBIAN-CVE-2026-47766","details":"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 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 -\u003e pts/ptmx` symlink. Version 1.28 fixes the issue.","modified":"2026-09-19T22:47:47.302796357Z","published":"2026-08-14T17:18:18.723Z","upstream":["CVE-2026-47766"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-47766"}],"affected":[{"package":{"name":"crun","ecosystem":"Debian:12","purl":"pkg:deb/debian/crun?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10-1","1.11-1","1.11.1-1","1.12-1","1.13-1","1.14-1","1.14.1-1","1.14.4-1","1.15-1","1.16-1","1.16.1-1","1.17-1","1.18-1","1.18.1-1","1.18.2-1","1.19.1-1","1.20-1","1.21-1","1.21-2","1.21-3","1.24-1","1.26-1","1.27-1","1.27.1-1","1.28-1","1.8.1-1","1.8.1-1+deb12u1","1.8.5-1","1.8.6-1","1.8.7-1","1.9-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47766.json"}},{"package":{"name":"crun","ecosystem":"Debian:13","purl":"pkg:deb/debian/crun?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.21-1","1.21-2","1.21-3","1.24-1","1.26-1","1.27-1","1.27.1-1","1.28-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47766.json"}},{"package":{"name":"crun","ecosystem":"Debian:14","purl":"pkg:deb/debian/crun?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.28-1"}]}],"versions":["1.21-1","1.21-2","1.21-3","1.24-1","1.26-1","1.27-1","1.27.1-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47766.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}