ubuntu-cve-2026-23679
Vulnerability from osv_ubuntu
Published
2026-05-27 14:16
Modified
2026-06-03 11:21
Summary
Details

libusb before version 1.0.30 contains a NULL pointer dereference vulnerability that allows attackers to crash applications by supplying a malformed USB configuration descriptor where an interface claims bNumEndpoints greater than zero but is followed by a class-specific descriptor whose bLength exceeds the remaining buffer size, causing parse_interface() to return early without allocating the endpoint array. Attackers can exploit this flaw through libusb_get_active_config_descriptor or libusb_get_config_descriptor by providing crafted descriptors via virtualized USB passthrough, file-based descriptor parsing, or network sources, causing any application iterating over endpoints to dereference a NULL endpoint pointer and crash.

Severity
6.2 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.9 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libusb++-0.1-4c2",
            "binary_version": "2:0.1.12-23.3ubuntu1"
          },
          {
            "binary_name": "libusb-0.1-4",
            "binary_version": "2:0.1.12-23.3ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "libusb",
        "purl": "pkg:deb/ubuntu/libusb@2:0.1.12-23.3ubuntu1?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:0.1.12-23.2ubuntu1",
        "2:0.1.12-23.3",
        "2:0.1.12-23.3ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libusb++-0.1-4v5",
            "binary_version": "2:0.1.12-28"
          },
          {
            "binary_name": "libusb-0.1-4",
            "binary_version": "2:0.1.12-28"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "libusb",
        "purl": "pkg:deb/ubuntu/libusb@2:0.1.12-28?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:0.1.12-27",
        "2:0.1.12-28"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libusb-0.1-4",
            "binary_version": "2:0.1.12-31"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "libusb",
        "purl": "pkg:deb/ubuntu/libusb@2:0.1.12-31?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:0.1.12-31"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libusb-0.1-4",
            "binary_version": "2:0.1.12-32"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libusb",
        "purl": "pkg:deb/ubuntu/libusb@2:0.1.12-32?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:0.1.12-32"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libusb-0.1-4",
            "binary_version": "2:0.1.12-32build3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libusb",
        "purl": "pkg:deb/ubuntu/libusb@2:0.1.12-32build3?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:0.1.12-32build2",
        "2:0.1.12-32build3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libusb-0.1-4",
            "binary_version": "2:0.1.12-35build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libusb",
        "purl": "pkg:deb/ubuntu/libusb@2:0.1.12-35build1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:0.1.12-32build3",
        "2:0.1.12-33",
        "2:0.1.12-35",
        "2:0.1.12-35build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libusb-0.1-4",
            "binary_version": "2:0.1.12-35build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libusb",
        "purl": "pkg:deb/ubuntu/libusb@2:0.1.12-35build1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:0.1.12-35build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libusb-0.1-4",
            "binary_version": "2:0.1.12-35build2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libusb",
        "purl": "pkg:deb/ubuntu/libusb@2:0.1.12-35build2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:0.1.12-35build1",
        "2:0.1.12-35build2"
      ]
    }
  ],
  "aliases": [],
  "details": "libusb before version 1.0.30 contains a NULL pointer dereference vulnerability that allows attackers to crash applications by supplying a malformed USB configuration descriptor where an interface claims bNumEndpoints greater than zero but is followed by a class-specific descriptor whose bLength exceeds the remaining buffer size, causing parse_interface() to return early without allocating the endpoint array. Attackers can exploit this flaw through libusb_get_active_config_descriptor or libusb_get_config_descriptor by providing crafted descriptors via virtualized USB passthrough, file-based descriptor parsing, or network sources, causing any application iterating over endpoints to dereference a NULL endpoint pointer and crash.",
  "id": "UBUNTU-CVE-2026-23679",
  "modified": "2026-06-03T11:21:38Z",
  "published": "2026-05-27T14:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-23679"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23679"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/libusb/libusb/commit/578ab76b4c434f8b204137ab6d7310689c7a9704"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/libusb/libusb/pull/1814"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/libusb/libusb/releases/tag/v1.0.30"
    },
    {
      "type": "REPORT",
      "url": "https://www.vulncheck.com/advisories/libusb-null-pointer-dereference-in-parse-interface"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/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": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-23679"
  ],
  "withdrawn": "2026-06-04T10:59:28Z"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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