{
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        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "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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          "date": "2026-07-17T14:56:51Z",
          "number": "2",
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    "title": "Security update on CVE-2026-12391"
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  "vulnerabilities": [
    {
      "cve": "CVE-2026-12391",
      "cwe": {
        "id": "CWE-59",
        "name": "Improper Link Resolution Before File Access ('Link Following')"
      },
      "notes": [
        {
          "category": "description",
          "text": "An insecure symlink following vulnerability exists in Canonical ubuntu-pro-client (formerly ubuntu-advantage-tools) within the pro collect-logs command framework. The utility creates or utilizes predictable temporary file paths or user-accessible log directories when gathering diagnostic information without verifying the file type or ownership. An unprivileged local attacker can exploit this behavior by creating a symbolic link (symlink) at a predictable destination path pointing to an arbitrary, root-readable file (such as /etc/shadow or private files within /root). When a root administrator or operator subsequently executes the pro collect-logs command, the tool follows the user-controlled symlink, reads the target file, and compresses its contents into the resulting diagnostic support archive. Because the output archive remains readable by the unprivileged user, the attacker can extract and read the sensitive root-owned files, leading to a complete information disclosure of system secrets.",
          "title": "Vulnerability description"
        }
      ],
      "product_status": {
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          "Ubuntu-18:ubuntu-advantage-pro-1:32.3~18.04+tuxcare.els1.all",
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          "Ubuntu-18:ubuntu-pro-client-l10n-1:32.3~18.04+tuxcare.els1.amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-12391"
        },
        {
          "category": "external",
          "summary": "https://ubuntu.com/security/CVE-2026-12391",
          "url": "https://ubuntu.com/security/CVE-2026-12391"
        }
      ],
      "release_date": "2026-07-16T13:16:00Z",
      "remediations": [
        {
          "category": "none_available",
          "date": "2026-07-17T12:46:15.826095Z",
          "details": "Affected",
          "product_ids": [
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            "Ubuntu-18:ubuntu-advantage-pro-1:32.3~18.04+tuxcare.els1.all",
            "Ubuntu-18:ubuntu-advantage-tools-1:29.4~18.04+tuxcare.els1.amd64",
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            "Ubuntu-18:ubuntu-pro-client-l10n-1:32.3~18.04+tuxcare.els1.amd64"
          ]
        }
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    }
  ]
}