runc container escape via “masked path” abuse due to mount race conditions_CVE-2025-31133

{
    "lastseen": "",
    "description": "runc is a CLI tool for spawning and running containers according to the OCI specification. In versions 1.2.7 and below, 1.3.0-rc.1 through 1.3.1, 1.4.0-rc.1 and 1.4.0-rc.2 files, runc would not perform sufficient verification that the source of the bind-mount (i.e., the container's /dev/null) was actually a real /dev/null inode when using the container's /dev/null to mask. This exposes two methods of attack:  an arbitrary mount gadget, leading to host information disclosure, host denial of service, container escape, or a bypassing of maskedPaths. This issue is fixed in versions 1.2.8, 1.3.3 and 1.4.0-rc.3.",
    "published": "2025-11-06T18:47:47.335Z",
    "modified": "2025-11-06T19:22:22.047Z",
    "type": "cve",
    "title": "runc container escape via \"masked path\" abuse due to mount race conditions",
    "source": "GitHub_M",
    "references": "https://github.com/opencontainers/runc/security/advisories/GHSA-9493-h29p-rfm2\nhttps://github.com/opencontainers/runc/commit/1a30a8f3d921acbbb6a4bb7e99da2c05f8d48522\nhttps://github.com/opencontainers/runc/commit/5d7b2424072449872d1cd0c937f2ca25f418eb66\nhttps://github.com/opencontainers/runc/commit/8476df83b534a2522b878c0507b3491def48db9f\nhttps://github.com/opencontainers/runc/commit/db19bbed5348847da433faa9d69e9f90192bfa64",
    "id": "CVE-2025-31133",
    "bulletinFamily": "",
    "cwe": [
        "CWE-61",
        "CWE-363"
    ],
    "cvelist": null,
    "sourceData": "opencontainers runc < 1.2.8\nopencontainers runc >= 1.3.0-rc.1, < 1.3.3\nopencontainers runc >= 1.4.0-rc.1, <= 1.4.0-rc.3",
    "sourceHref": "",
    "cvss": {
        "score": 7.3,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "runc",
    "version": "< 1.2.8",
    "vendor": "opencontainers",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}