{"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": "2026-07-01T13:35:41.354Z"}, "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"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-01T13:34:05.348945Z", "id": "CVE-2026-41579", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-01T13:35:41.354Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-41579", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-01T13:34:05.348945Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-01T13:34:14.139Z"}}], "cna": {"title": "runc: Malicious image with /dev symlink can trigger limited host filesystem integrity violations", "source": {"advisory": "GHSA-xjvp-4fhw-gc47", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 3.3, "attackVector": "LOCAL", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "opencontainers", "product": "runc", "versions": [{"status": "affected", "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"}]}], "references": [{"url": "https://github.com/opencontainers/runc/security/advisories/GHSA-xjvp-4fhw-gc47", "name": "https://github.com/opencontainers/runc/security/advisories/GHSA-xjvp-4fhw-gc47", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/opencontainers/runc/commit/864db8042dbb", "name": "https://github.com/opencontainers/runc/commit/864db8042dbb", "tags": ["x_refsource_MISC"]}], "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-61", "description": "CWE-61: UNIX Symbolic Link (Symlink) Following"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-01T00:02:08.639Z"}}}, "cveMetadata": {"cveId": "CVE-2026-41579", "state": "PUBLISHED", "dateUpdated": "2026-07-01T13:35:41.354Z", "dateReserved": "2026-04-21T14:15:21.958Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-07-01T00:02:08.639Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.3.6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.4.0-rc.1,1.4.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.5.0-rc.1,1.5.0-rc.3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "runc", "source": "cna", "vendor": "opencontainers"}, "product": "runc", "vendor": "opencontainers"}], "created": "2026-07-01T03:15:15.525640+00:00", "updated": "2026-07-01T15:15:04.138199+00:00", "vendors": ["opencontainers", "opencontainers$PRODUCT$runc"]}