{"id":"CVE-2026-41579","revision":"2346826c955d4a92b3b718156bb31330","records":[{"revision":"2346826c955d4a92b3b718156bb31330","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-41579","aliases":[],"title":"runc: Malicious image with /dev symlink can trigger limited host filesystem integrity violations","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, 1.4.0-rc.12, 1.5.0-rc.1, and 1.5.0-rc.1, 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, because Docker creates a top-level read-only layer that masks any malicious /dev\u00A0symlink present in the container image — unlike some other Linux container tooling, whose higher-level runtimes built on runc remain exposed to exploitation via a malicious image. This issue has been fixed in versions 1.3.6, 1.4.3 and 1.5.0.","state":0,"publishedAt":"2026-07-01T00:02:08.639+00:00","modifiedAt":"2026-07-01T13:35:41.354+00:00","affected":[{"ecosystem":"Vendor product","name":"runc","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"opencontainers\",\n                    \"product\": \"runc\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.3.6\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 1.4.0-rc.1, < 1.4.3\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 1.5.0-rc.1, < 1.5.0-rc.3\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","score":3.3,"severity":"LOW"}],"references":["https://github.com/opencontainers/runc/security/advisories/GHSA-xjvp-4fhw-gc47","https://github.com/opencontainers/runc/commit/864db8042dbb"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-41579","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-41579","identifiers":["CVE-2026-41579"]},"retained":false,"historicalAffected":[]}],"coverage":[]}