CVE-2026-41579

{"id": "CVE-2026-41579", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-41579", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-01T13:34:05.348945Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"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"}, "impactScore": 1.4, "exploitabilityScore": 1.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"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"}]}]}], "published": "2026-07-01T02:17:00.193", "references": [{"url": "https://github.com/opencontainers/runc/commit/864db8042dbb", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/opencontainers/runc/security/advisories/GHSA-xjvp-4fhw-gc47", "tags": ["Mitigation", "Patch", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-61"}]}], "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."}], "lastModified": "2026-07-02T19:36:49.830", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "66E8E6E0-E0A3-4C49-A418-D1CA76D0FAEF", "versionEndExcluding": "1.3.6"}, {"criteria": "cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3692DBD2-9876-4C63-8C93-2262F86EF95A", "versionEndExcluding": "1.4.3", "versionStartIncluding": "1.4.0"}, {"criteria": "cpe:2.3:a:linuxfoundation:runc:1.5.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2FEAC66F-F2B2-4B23-8061-3B8B44EAECD8"}, {"criteria": "cpe:2.3:a:linuxfoundation:runc:1.5.0:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "ED7FCB70-52A0-42C3-A10F-247FEF7AEC08"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}