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        "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.",
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        "summary": "Canonical URL",
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  "vulnerabilities": [
    {
      "cve": "CVE-2026-27456",
      "cwe": {
        "id": "CWE-59",
        "name": "Improper Link Resolution Before File Access"
      },
      "notes": [
        {
          "category": "description",
          "text": "util-linux is a random collection of Linux utilities. Prior to version 2.41.4, a TOCTOU (Time-of-Check-Time-of-Use) vulnerability has been identified in the SUID binary /usr/bin/mount from util-linux. The mount binary, when setting up loop devices, validates the source file path with user privileges via fork() + setuid() + realpath(), but subsequently re-canonicalizes and opens it with root privileges (euid=0) without verifying that the path has not been replaced between both operations. Neither O_NOFOLLOW, nor inode comparison, nor post-open fstat() are employed. This allows a local unprivileged user to replace the source file with a symlink pointing to any root-owned file or device during the race window, causing the SUID binary to open and mount it as root. Exploitation requires an /etc/fstab entry with user,loop options whose path points to a directory where the attacker has write permission, and that /usr/bin/mount has the SUID bit set (the default configuration on virtually all Linux distributions). The impact is unauthorized read access to root-protected files and block devices, including backup images, disk volumes, and any file containing a valid filesystem. This issue has been patched in version 2.41.4.",
          "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"
        }
      ],
      "product_status": {
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-27456"
        },
        {
          "category": "external",
          "summary": "https://github.com/util-linux/util-linux/commit/5e390467b26a3cf3fecc04e1a0d482dff3162fc4",
          "url": "https://github.com/util-linux/util-linux/commit/5e390467b26a3cf3fecc04e1a0d482dff3162fc4"
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          "category": "external",
          "summary": "https://github.com/util-linux/util-linux/releases/tag/v2.41.4",
          "url": "https://github.com/util-linux/util-linux/releases/tag/v2.41.4"
        },
        {
          "category": "external",
          "summary": "https://github.com/util-linux/util-linux/security/advisories/GHSA-qq4x-vfq4-9h9g",
          "url": "https://github.com/util-linux/util-linux/security/advisories/GHSA-qq4x-vfq4-9h9g"
        }
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      "release_date": "2026-04-03T22:16:00Z",
      "remediations": [
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          "category": "no_fix_planned",
          "date": "2026-08-03T16:09:04.249109Z",
          "details": "This issue is local-only and high-complexity, and it is only reachable if an administrator has explicitly created a non-default /etc/fstab entry with user,loop that targets a path within a directory the attacker can write; by default, fstab uses nouser and does not provide such loop-backed user mounts. Even if reachable, the effect is limited to read-only disclosure of files/devices with no integrity, availability, code execution, or privilege‑escalation impact. In centrally managed server and cloud VM environments where untrusted users lack shell access, /usr/bin/mount is not SUID, or no such fstab entry exists, the vulnerability is not practically exploitable and can be safely deprioritized.",
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
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