ubuntu-cve-2026-55371
Vulnerability from osv_ubuntu
Published
2026-08-25 00:00
Modified
2026-08-27 08:38
Summary
Details

OpenEXR is the reference implementation and specification for the EXR high-dynamic-range image file format, widely used in the motion picture industry. Versions 3.4.0 through 3.4.12 contain a NULL pointer dereference in the OpenEXRCore function exr_attr_set_bytes(). The public setter validates the top-level exr_attr_bytes_t value pointer but does not verify that the nested type_hint pointer is non-NULL when hint_length is greater than zero. When a caller supplies a positive hint_length together with a NULL type_hint, exr_attr_bytes_create() allocates a destination type-hint buffer and then copies from the NULL source pointer, causing a deterministic crash. The flaw is reachable through the public OpenEXRCore C API and results in a denial of service. The issue is fixed in version 3.4.13.

Severity
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
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": "libopenexr22",
            "binary_version": "2.2.0-10ubuntu2.6+esm4"
          },
          {
            "binary_name": "openexr",
            "binary_version": "2.2.0-10ubuntu2.6+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "openexr",
        "purl": "pkg:deb/ubuntu/openexr@2.2.0-10ubuntu2.6+esm4?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.2.0-1ubuntu3",
        "2.2.0-7ubuntu1",
        "2.2.0-9ubuntu1",
        "2.2.0-10ubuntu2",
        "2.2.0-10ubuntu2.1",
        "2.2.0-10ubuntu2.2",
        "2.2.0-10ubuntu2.3",
        "2.2.0-10ubuntu2.4",
        "2.2.0-10ubuntu2.6",
        "2.2.0-10ubuntu2.6+esm1",
        "2.2.0-10ubuntu2.6+esm2",
        "2.2.0-10ubuntu2.6+esm3",
        "2.2.0-10ubuntu2.6+esm4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libopenexr22",
            "binary_version": "2.2.0-11.1ubuntu1.9+esm1"
          },
          {
            "binary_name": "openexr",
            "binary_version": "2.2.0-11.1ubuntu1.9+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "openexr",
        "purl": "pkg:deb/ubuntu/openexr@2.2.0-11.1ubuntu1.9+esm1?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.2.0-11ubuntu1",
        "2.2.0-11.1ubuntu1",
        "2.2.0-11.1ubuntu1.1",
        "2.2.0-11.1ubuntu1.2",
        "2.2.0-11.1ubuntu1.3",
        "2.2.0-11.1ubuntu1.4",
        "2.2.0-11.1ubuntu1.6",
        "2.2.0-11.1ubuntu1.7",
        "2.2.0-11.1ubuntu1.8",
        "2.2.0-11.1ubuntu1.9",
        "2.2.0-11.1ubuntu1.9+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libopenexr24",
            "binary_version": "2.3.0-6ubuntu0.5+esm2"
          },
          {
            "binary_name": "openexr",
            "binary_version": "2.3.0-6ubuntu0.5+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "openexr",
        "purl": "pkg:deb/ubuntu/openexr@2.3.0-6ubuntu0.5+esm2?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.2.1-4.1ubuntu1",
        "2.3.0-6",
        "2.3.0-6build1",
        "2.3.0-6ubuntu0.1",
        "2.3.0-6ubuntu0.2",
        "2.3.0-6ubuntu0.3",
        "2.3.0-6ubuntu0.5",
        "2.3.0-6ubuntu0.5+esm1",
        "2.3.0-6ubuntu0.5+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libopenexr25",
            "binary_version": "2.5.7-1ubuntu0.1~esm2"
          },
          {
            "binary_name": "openexr",
            "binary_version": "2.5.7-1ubuntu0.1~esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "openexr",
        "purl": "pkg:deb/ubuntu/openexr@2.5.7-1ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.5.4-2",
        "2.5.7-1",
        "2.5.7-1ubuntu0.1~esm1",
        "2.5.7-1ubuntu0.1~esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libopenexr-3-1-30",
            "binary_version": "3.1.5-5.1ubuntu0.1~esm1"
          },
          {
            "binary_name": "openexr",
            "binary_version": "3.1.5-5.1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "openexr",
        "purl": "pkg:deb/ubuntu/openexr@3.1.5-5.1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1.5-5.1",
        "3.1.5-5.1build1",
        "3.1.5-5.1build2",
        "3.1.5-5.1build3",
        "3.1.5-5.1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libopenexr-3-1-30",
            "binary_version": "3.1.13-2ubuntu0.26.04.1~esm1"
          },
          {
            "binary_name": "openexr",
            "binary_version": "3.1.13-2ubuntu0.26.04.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:26.04:LTS",
        "name": "openexr",
        "purl": "pkg:deb/ubuntu/openexr@3.1.13-2ubuntu0.26.04.1~esm1?arch=source\u0026distro=esm-apps/resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1.13-2",
        "3.1.13-2build1",
        "3.1.13-2ubuntu0.26.04.1~esm1"
      ]
    }
  ],
  "aliases": [],
  "details": "OpenEXR is the reference implementation and specification for the EXR high-dynamic-range image file format, widely used in the motion picture industry. Versions 3.4.0 through 3.4.12 contain a NULL pointer dereference in the OpenEXRCore function exr_attr_set_bytes(). The public setter validates the top-level exr_attr_bytes_t value pointer but does not verify that the nested type_hint pointer is non-NULL when hint_length is greater than zero. When a caller supplies a positive hint_length together with a NULL type_hint, exr_attr_bytes_create() allocates a destination type-hint buffer and then copies from the NULL source pointer, causing a deterministic crash. The flaw is reachable through the public OpenEXRCore C API and results in a denial of service. The issue is fixed in version 3.4.13.",
  "id": "UBUNTU-CVE-2026-55371",
  "modified": "2026-08-27T08:38:38Z",
  "published": "2026-08-25T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-55371"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-55371"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/academysoftwarefoundation/openexr/security/advisories/ghsa-xx72-f24p-cf6r"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/cveproject/cvelistv5/tree/main/cves/2026/55xxx/cve-2026-55371.json"
    },
    {
      "type": "REPORT",
      "url": "https://nvd.nist.gov/vuln/detail/cve-2026-55371"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "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": "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-2026-55371"
  ]
}



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