ubuntu-cve-2025-31133
Vulnerability from osv_ubuntu
Published
2025-11-05 09:00
Modified
2026-01-20 05:27
Summary
Details

runc is a CLI tool for spawning and running containers according to the OCI specification. In versions 1.2.7 and below, 1.3.0-rc.1 through 1.3.1, 1.4.0-rc.1 and 1.4.0-rc.2 files, runc would not perform sufficient verification that the source of the bind-mount (i.e., the container's /dev/null) was actually a real /dev/null inode when using the container's /dev/null to mask. This exposes two methods of attack: an arbitrary mount gadget, leading to host information disclosure, host denial of service, container escape, or a bypassing of maskedPaths. This issue is fixed in versions 1.2.8, 1.3.3 and 1.4.0-rc.3.

Severity
7.3 (High)
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
7.8 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
N/A (UNKNOWN)
high
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-opencontainers-runc-dev",
            "binary_version": "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4"
          },
          {
            "binary_name": "runc",
            "binary_version": "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4"
          }
        ],
        "priority_reason": "runc developers have rated this as being high severity"
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "runc",
        "purl": "pkg:deb/ubuntu/runc@1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0.8+dfsg-2",
        "0.1.1-0ubuntu5~16.04",
        "1.0.0~rc1-0ubuntu1~16.04",
        "1.0.0~rc1-0ubuntu2~16.04.1",
        "1.0.0~rc1-0ubuntu2~16.04.1.1",
        "1.0.0~rc2-0ubuntu2~16.04.1",
        "1.0.0~rc2+docker1.12.6-0ubuntu1~16.04.1",
        "1.0.0~rc2+docker1.13.1-0ubuntu1~16.04.1",
        "1.0.0~rc2+docker1.13.1-0ubuntu1~16.04.2",
        "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.3",
        "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4",
        "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm1",
        "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm2",
        "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-opencontainers-runc-dev",
            "binary_version": "1.1.4-0ubuntu1~18.04.2+esm1"
          },
          {
            "binary_name": "runc",
            "binary_version": "1.1.4-0ubuntu1~18.04.2+esm1"
          }
        ],
        "priority_reason": "runc developers have rated this as being high severity"
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "runc",
        "purl": "pkg:deb/ubuntu/runc@1.1.4-0ubuntu1~18.04.2+esm1?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0~rc2+docker1.13.1-0ubuntu1",
        "1.0.0~rc4+dfsg1-2",
        "1.0.0~rc4+dfsg1-6",
        "1.0.0~rc4+dfsg1-6ubuntu0.18.04.1",
        "1.0.0~rc7+git20190403.029124da-0ubuntu1~18.04.1",
        "1.0.0~rc7+git20190403.029124da-0ubuntu1~18.04.2",
        "1.0.0~rc7+git20190403.029124da-0ubuntu1~18.04.2+esm1",
        "1.0.0~rc10-0ubuntu1~18.04.1",
        "1.0.0~rc10-0ubuntu1~18.04.2",
        "1.0.0~rc93-0ubuntu1~18.04.1",
        "1.0.0~rc93-0ubuntu1~18.04.2",
        "1.0.0~rc95-0ubuntu1~18.04.1",
        "1.0.0~rc95-0ubuntu1~18.04.2",
        "1.0.1-0ubuntu2~18.04.1",
        "1.1.0-0ubuntu1~18.04.1",
        "1.1.4-0ubuntu1~18.04.1",
        "1.1.4-0ubuntu1~18.04.2",
        "1.1.4-0ubuntu1~18.04.2+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-opencontainers-runc-dev",
            "binary_version": "1.1.7-0ubuntu1~20.04.5"
          }
        ],
        "priority_reason": "runc developers have rated this as being high severity"
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "runc",
        "purl": "pkg:deb/ubuntu/runc@1.1.7-0ubuntu1~20.04.5?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0~rc8+git20190923.3e425f80-0ubuntu1",
        "1.0.0~rc10-0ubuntu1",
        "1.0.0~rc93-0ubuntu1~20.04.1",
        "1.0.0~rc93-0ubuntu1~20.04.2",
        "1.0.0~rc95-0ubuntu1~20.04.1",
        "1.0.0~rc95-0ubuntu1~20.04.2",
        "1.0.1-0ubuntu2~20.04.1",
        "1.1.0-0ubuntu1~20.04.1",
        "1.1.0-0ubuntu1~20.04.2",
        "1.1.4-0ubuntu1~20.04.1",
        "1.1.4-0ubuntu1~20.04.2",
        "1.1.4-0ubuntu1~20.04.3",
        "1.1.7-0ubuntu1~20.04.1",
        "1.1.7-0ubuntu1~20.04.2",
        "1.1.7-0ubuntu1~20.04.4",
        "1.1.7-0ubuntu1~20.04.5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "runc",
            "binary_version": "1.1.12-0ubuntu2~20.04.1"
          }
        ],
        "priority_reason": "runc developers have rated this as being high severity"
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "runc-app",
        "purl": "pkg:deb/ubuntu/runc-app@1.1.12-0ubuntu2~20.04.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.12-0ubuntu2~20.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-opencontainers-runc-dev",
            "binary_version": "1.1.7-0ubuntu1~22.04.6"
          }
        ],
        "priority_reason": "runc developers have rated this as being high severity"
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "runc",
        "purl": "pkg:deb/ubuntu/runc@1.1.7-0ubuntu1~22.04.6?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.1-0ubuntu2",
        "1.0.1-0ubuntu3",
        "1.0.3-0ubuntu1",
        "1.1.0-0ubuntu1",
        "1.1.0-0ubuntu1.1",
        "1.1.4-0ubuntu1~22.04.1",
        "1.1.4-0ubuntu1~22.04.2",
        "1.1.4-0ubuntu1~22.04.3",
        "1.1.7-0ubuntu1~22.04.1",
        "1.1.7-0ubuntu1~22.04.2",
        "1.1.7-0ubuntu1~22.04.4",
        "1.1.7-0ubuntu1~22.04.5",
        "1.1.7-0ubuntu1~22.04.6"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "runc",
            "binary_version": "1.3.3-0ubuntu1~22.04.2"
          }
        ],
        "priority_reason": "runc developers have rated this as being high severity"
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "runc-app",
        "purl": "pkg:deb/ubuntu/runc-app@1.3.3-0ubuntu1~22.04.2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3.3-0ubuntu1~22.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.12-0ubuntu2~22.04.1",
        "1.2.5-0ubuntu1~22.04.1",
        "1.3.0-0ubuntu2~22.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-opencontainers-runc-dev",
            "binary_version": "1.1.12+ds1-2ubuntu1.3"
          }
        ],
        "priority_reason": "runc developers have rated this as being high severity"
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "runc",
        "purl": "pkg:deb/ubuntu/runc@1.1.12+ds1-2ubuntu1.3?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.7-0ubuntu2",
        "1.1.10+ds1-1ubuntu1",
        "1.1.10+ds1-1ubuntu2",
        "1.1.12+ds1-1ubuntu1",
        "1.1.12+ds1-2ubuntu1",
        "1.1.12+ds1-2ubuntu1.1",
        "1.1.12+ds1-2ubuntu1.2",
        "1.1.12+ds1-2ubuntu1.3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "runc",
            "binary_version": "1.3.3-0ubuntu1~24.04.2"
          }
        ],
        "priority_reason": "runc developers have rated this as being high severity"
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "runc-app",
        "purl": "pkg:deb/ubuntu/runc-app@1.3.3-0ubuntu1~24.04.2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3.3-0ubuntu1~24.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.10-0ubuntu1",
        "1.1.12-0ubuntu1",
        "1.1.12-0ubuntu2",
        "1.1.12-0ubuntu3",
        "1.1.12-0ubuntu3.1",
        "1.2.5-0ubuntu1~24.04.1",
        "1.3.0-0ubuntu2~24.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-opencontainers-runc-dev",
            "binary_version": "1.1.15+ds1-2ubuntu1"
          }
        ],
        "priority_reason": "runc developers have rated this as being high severity"
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "runc",
        "purl": "pkg:deb/ubuntu/runc@1.1.15+ds1-2ubuntu1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.15+ds1-2ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "runc",
            "binary_version": "1.3.3-0ubuntu1~25.10.2"
          }
        ],
        "priority_reason": "runc developers have rated this as being high severity"
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "runc-app",
        "purl": "pkg:deb/ubuntu/runc-app@1.3.3-0ubuntu1~25.10.2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3.3-0ubuntu1~25.10.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2.5-0ubuntu1",
        "1.3.0-0ubuntu1",
        "1.3.0-0ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "runc-stable",
            "binary_version": "1.3.3-0ubuntu1~25.10.2"
          }
        ],
        "priority_reason": "runc developers have rated this as being high severity"
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "runc-stable",
        "purl": "pkg:deb/ubuntu/runc-stable@1.3.3-0ubuntu1~25.10.2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3.3-0ubuntu1~25.10.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.0-0ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "runc is a CLI tool for spawning and running containers according to the OCI specification. In versions 1.2.7 and below, 1.3.0-rc.1 through 1.3.1, 1.4.0-rc.1 and 1.4.0-rc.2 files, runc would not perform sufficient verification that the source of the bind-mount (i.e., the container\u0027s /dev/null) was actually a real /dev/null inode when using the container\u0027s /dev/null to mask. This exposes two methods of attack:  an arbitrary mount gadget, leading to host information disclosure, host denial of service, container escape, or a bypassing of maskedPaths. This issue is fixed in versions 1.2.8, 1.3.3 and 1.4.0-rc.3.",
  "id": "UBUNTU-CVE-2025-31133",
  "modified": "2026-01-20T05:27:24Z",
  "published": "2025-11-05T09:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-31133"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-31133"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/opencontainers/runc/security/advisories/GHSA-9493-h29p-rfm2"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7851-1"
    }
  ],
  "related": [
    "USN-7851-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "high",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-31133"
  ]
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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Detection rules are retrieved from Rulezet.