{"id":"CVE-2026-41579","revision":"e07e925be3db4e4b8cc289b44e29da65","records":[{"revision":"e07e925be3db4e4b8cc289b44e29da65","observedAt":"2026-10-27T10:10:19.004+00:00","statement":{"source":"nvd","id":"CVE-2026-41579","aliases":[],"title":"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…","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":"2026-07-01T02:17:00.193+00:00","modifiedAt":"2026-10-25T17:10:00.197+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","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/commit/864db8042dbb","https://github.com/opencontainers/runc/security/advisories/GHSA-xjvp-4fhw-gc47"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-41579","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-61"],"productCriteria":["cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:runc:1.5.0:rc1:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:runc:1.5.0:rc2:*:*:*:*:*:*"],"sourceDates":{"published":"2026-07-01T02:17:00.193","lastModified":"2026-10-25T17:10:00.197"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-41579","identifiers":["CVE-2026-41579"]},"retained":false,"historicalAffected":[]}],"coverage":[]}