{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-41579", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-21T14:15:21.958Z", "datePublished": "2026-07-01T00:02:08.639Z", "dateUpdated": "2026-07-01T00:02:08.639Z"}, "containers": {"cna": {"title": "runc: Malicious image with /dev symlink can trigger limited host filesystem integrity violations", "problemTypes": [{"descriptions": [{"cweId": "CWE-61", "lang": "en", "description": "CWE-61: UNIX Symbolic Link (Symlink) Following", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 3.3, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/opencontainers/runc/security/advisories/GHSA-xjvp-4fhw-gc47", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/opencontainers/runc/security/advisories/GHSA-xjvp-4fhw-gc47"}, {"name": "https://github.com/opencontainers/runc/commit/864db8042dbb", "tags": ["x_refsource_MISC"], "url": "https://github.com/opencontainers/runc/commit/864db8042dbb"}], "affected": [{"vendor": "opencontainers", "product": "runc", "versions": [{"version": "< 1.3.6", "status": "affected"}, {"version": ">= 1.4.0-rc.1, < 1.4.3", "status": "affected"}, {"version": ">= 1.5.0-rc.1, < 1.5.0-rc.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-01T00:02:08.639Z"}, "descriptions": [{"lang": "en", "value": "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 \u2014 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."}], "source": {"advisory": "GHSA-xjvp-4fhw-gc47", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{}