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      "text": "TuxCare License Agreement",
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        "url": "https://www.first.org/tlp/"
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    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
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    "title": "Security update on CVE-2021-20208"
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      "cve": "CVE-2021-20208",
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          "category": "description",
          "text": "A flaw was found in cifs-utils in versions before 6.13. A user when mounting a krb5 CIFS file system from within a container can use Kerberos credentials of the host. The highest threat from this vulnerability is to data confidentiality and integrity.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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          "summary": "https://bugzilla.redhat.com/show_bug.cgi?id=1921116",
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          "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2W4HSDIWXXNQBUW5ZS37RQMLJ7THK5AS/",
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2W4HSDIWXXNQBUW5ZS37RQMLJ7THK5AS/"
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          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z4BZSJXROEFHYATAAHHRR6P3HUSMPQB3/"
        }
      ],
      "release_date": "2021-04-19T22:15:00Z",
      "remediations": [
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          "date": "2026-10-15T12:47:17.499146Z",
          "details": "Low practical risk: exploitation is local-only and requires a container process to be explicitly granted filesystem‑mounting capability (e.g., CAP_SYS_ADMIN or a privileged container) and to perform a Kerberos‑authenticated CIFS mount from inside the container. Even then, it does not expose the host’s Kerberos cache contents; it may only cause an SMB access attempt that reuses host credentials (often in multiuser/DFS configurations), with no availability impact. In centrally managed enterprise VM/server deployments where containers aren’t allowed to mount filesystems or Kerberos SMB mounts are performed on the host rather than inside containers, exposure is negligible and this CVE can be safely deprioritized.",
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            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "NONE",
            "baseScore": 4.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:S/C:P/I:P/A:N",
            "version": "2.0"
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            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:N",
            "version": "3.1"
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