usn-8496-2
Vulnerability from osv_ubuntu
Published
2026-07-03 18:49
Modified
2026-07-03 18:49
Summary
cifs-utils regression
Details

USN-8496-1 fixed a vulnerability in cifs-utils. Unfortunately, the fix introduced a regression with Kerberos mounts. This update reverts the security update until a complete fix is available.

We apologize for the inconvenience.

Original advisory details:

It was discovered that cifs-utils incorrectly dropped root privileges before looking up user information. A local attacker could possibly use this issue to execute arbitrary code as the root user.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "cifs-utils",
            "binary_version": "2:6.14-1ubuntu0.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "cifs-utils",
        "purl": "pkg:deb/ubuntu/cifs-utils@2:6.14-1ubuntu0.5?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:6.14-1ubuntu0.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:6.11-3.1",
        "2:6.14-1",
        "2:6.14-1build1",
        "2:6.14-1ubuntu0.1",
        "2:6.14-1ubuntu0.2",
        "2:6.14-1ubuntu0.3",
        "2:6.14-1ubuntu0.4"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "cifs-utils",
            "binary_version": "2:7.0-2ubuntu0.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "cifs-utils",
        "purl": "pkg:deb/ubuntu/cifs-utils@2:7.0-2ubuntu0.4?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:7.0-2ubuntu0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:7.0-2",
        "2:7.0-2build1",
        "2:7.0-2ubuntu0.1",
        "2:7.0-2ubuntu0.2",
        "2:7.0-2ubuntu0.3"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [],
          "ecosystem": "Ubuntu:25.10"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "cifs-utils",
            "binary_version": "2:7.4-1ubuntu0.25.10.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "cifs-utils",
        "purl": "pkg:deb/ubuntu/cifs-utils@2:7.4-1ubuntu0.25.10.2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:7.4-1ubuntu0.25.10.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:7.2-2",
        "2:7.3-1",
        "2:7.4-1",
        "2:7.4-1ubuntu0.25.10.1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [],
          "ecosystem": "Ubuntu:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "cifs-utils",
            "binary_version": "2:7.4-1ubuntu0.26.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "cifs-utils",
        "purl": "pkg:deb/ubuntu/cifs-utils@2:7.4-1ubuntu0.26.04.2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:7.4-1ubuntu0.26.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:7.4-1",
        "2:7.4-1build1",
        "2:7.4-1ubuntu0.26.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "USN-8496-1 fixed a vulnerability in cifs-utils. Unfortunately, the fix\nintroduced a regression with Kerberos mounts. This update reverts the\nsecurity update until a complete fix is available.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that cifs-utils incorrectly dropped root privileges\n before looking up user information. A local attacker could possibly use\n this issue to execute arbitrary code as the root user.",
  "id": "USN-8496-2",
  "modified": "2026-07-03T18:49:32Z",
  "published": "2026-07-03T18:49:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8496-2"
    },
    {
      "type": "REPORT",
      "url": "https://launchpad.net/bugs/2159053"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "cifs-utils regression",
  "upstream": []
}



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