ALSA-2026:93461 (CVE-2026-13595)

Vulnerability from osv_almalinux – Published: 2026-11-02 00:00 – Updated: 2026-11-02 09:13 – Source website
VLAI
Summary
Important: util-linux security update
Details

The util-linux packages contain a large variety of low-level system utilities that are necessary for a Linux system to function. Among others, these include the fdisk configuration tool and the login program.

Security Fix(es):

  • util-linux: TOCTOU in the mount program when setting up loop devices (CVE-2026-27456)
  • util-linux: util-linux: heap use-after-free in libblkid nested partition probing (CVE-2026-13595)
  • util-linux: TOCTOU in the mount program via ancestor directory swap on target path (CVE-2026-53613)
  • util-linux: util-linux: TOCTOU in the mount program when applying post-mount ownership/mode changes (CVE-2026-53612)
  • util-linux: util-linux: SUID mount(8) allows nosuid/noexec bypass via LIBMOUNT_FORCE_MOUNT2 (CVE-2026-53614)
  • util-linux: util-linux: failed external mount helper still runs privileged X-mount post-hooks (CVE-2026-76642)
  • util-linux: util-linux: nsenter --join-cgroup leaks root cgroup migration authority (CVE-2026-78408)
  • util-linux: util-linux: restricted bind mounts do not pin the source, allowing X-mount.owner/group/mode redirection (CVE-2026-78410)
  • util-linux: util-linux: Partition metadata compromise via integer overflow in DOS partition parser (CVE-2026-53615)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libblkid"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.40.2-18.el10_2.20"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libblkid-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.40.2-18.el10_2.20"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libfdisk"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.40.2-18.el10_2.20"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libfdisk-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.40.2-18.el10_2.20"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libmount"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.40.2-18.el10_2.20"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libmount-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.40.2-18.el10_2.20"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libsmartcols"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.40.2-18.el10_2.20"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libsmartcols-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.40.2-18.el10_2.20"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libuuid"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.40.2-18.el10_2.20"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libuuid-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.40.2-18.el10_2.20"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "python3-libmount"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.40.2-18.el10_2.20"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "util-linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.40.2-18.el10_2.20"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "util-linux-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.40.2-18.el10_2.20"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "uuidd"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.40.2-18.el10_2.20"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "The util-linux packages contain a large variety of low-level system utilities that are necessary for a Linux system to function. Among others, these include the fdisk configuration tool and the login program.  \n\nSecurity Fix(es):  \n\n  * util-linux: TOCTOU in the mount program when setting up loop devices (CVE-2026-27456)\n  * util-linux: util-linux: heap use-after-free in libblkid nested partition probing (CVE-2026-13595)\n  * util-linux: TOCTOU in the mount program via ancestor directory swap on target path (CVE-2026-53613)\n  * util-linux: util-linux: TOCTOU in the mount program when applying post-mount ownership/mode changes (CVE-2026-53612)\n  * util-linux: util-linux: SUID mount(8) allows nosuid/noexec bypass via LIBMOUNT_FORCE_MOUNT2 (CVE-2026-53614)\n  * util-linux: util-linux: failed external mount helper still runs privileged X-mount post-hooks (CVE-2026-76642)\n  * util-linux: util-linux: nsenter --join-cgroup leaks root cgroup migration authority (CVE-2026-78408)\n  * util-linux: util-linux: restricted bind mounts do not pin the source, allowing X-mount.owner/group/mode redirection (CVE-2026-78410)\n  * util-linux: util-linux: Partition metadata compromise via integer overflow in DOS partition parser (CVE-2026-53615)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:93461",
  "modified": "2026-11-02T09:13:40Z",
  "published": "2026-11-02T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:93461"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-13595"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-27456"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-53612"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-53613"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-53614"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-53615"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-76642"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-78408"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-78410"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2454956"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2494101"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2519646"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2519647"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2519648"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2521999"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2522497"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2522684"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2552551"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/10/ALSA-2026-93461.html"
    }
  ],
  "related": [
    "CVE-2026-13595",
    "CVE-2026-27456",
    "CVE-2026-53612",
    "CVE-2026-53613",
    "CVE-2026-53614",
    "CVE-2026-53615",
    "CVE-2026-76642",
    "CVE-2026-78408",
    "CVE-2026-78410"
  ],
  "schema_version": "1.7.0",
  "summary": "Important: util-linux security update",
  "upstream": [
    "CVE-2026-13595",
    "CVE-2026-27456",
    "CVE-2026-53612",
    "CVE-2026-53613",
    "CVE-2026-53614",
    "CVE-2026-53615",
    "CVE-2026-76642",
    "CVE-2026-78408",
    "CVE-2026-78410"
  ]
}



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