usn-5279-1
Vulnerability from osv_ubuntu
Published
2022-02-09 13:26
Modified
2026-04-22 07:37
Summary
util-linux vulnerabilities
Details

It was discovered that util-linux incorrectly handled unmounting FUSE filesystems. A local attacker could possibly use this issue to unmount FUSE filesystems belonging to other users.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-3995",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-3996",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bsdutils",
            "binary_version": "1:2.34-0.1ubuntu9.3"
          },
          {
            "binary_name": "fdisk",
            "binary_version": "2.34-0.1ubuntu9.3"
          },
          {
            "binary_name": "libblkid1",
            "binary_version": "2.34-0.1ubuntu9.3"
          },
          {
            "binary_name": "libfdisk1",
            "binary_version": "2.34-0.1ubuntu9.3"
          },
          {
            "binary_name": "libmount1",
            "binary_version": "2.34-0.1ubuntu9.3"
          },
          {
            "binary_name": "libsmartcols1",
            "binary_version": "2.34-0.1ubuntu9.3"
          },
          {
            "binary_name": "libuuid1",
            "binary_version": "2.34-0.1ubuntu9.3"
          },
          {
            "binary_name": "mount",
            "binary_version": "2.34-0.1ubuntu9.3"
          },
          {
            "binary_name": "rfkill",
            "binary_version": "2.34-0.1ubuntu9.3"
          },
          {
            "binary_name": "util-linux",
            "binary_version": "2.34-0.1ubuntu9.3"
          },
          {
            "binary_name": "util-linux-locales",
            "binary_version": "2.34-0.1ubuntu9.3"
          },
          {
            "binary_name": "uuid-runtime",
            "binary_version": "2.34-0.1ubuntu9.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "util-linux",
        "purl": "pkg:deb/ubuntu/util-linux@2.34-0.1ubuntu9.3?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.34-0.1ubuntu9.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.34-0.1ubuntu2",
        "2.34-0.1ubuntu4",
        "2.34-0.1ubuntu5",
        "2.34-0.1ubuntu6",
        "2.34-0.1ubuntu7",
        "2.34-0.1ubuntu8",
        "2.34-0.1ubuntu9",
        "2.34-0.1ubuntu9.1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that util-linux incorrectly handled unmounting FUSE\nfilesystems. A local attacker could possibly use this issue to unmount\nFUSE filesystems belonging to other users.\n",
  "id": "USN-5279-1",
  "modified": "2026-04-22T07:37:01Z",
  "published": "2022-02-09T13:26:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5279-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3995"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3996"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "util-linux vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2021-3995",
    "UBUNTU-CVE-2021-3996"
  ]
}



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