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ubuntu-cve-2026-65979
Vulnerability from osv_ubuntu
Published
2026-08-25 19:16
Modified
2026-09-02 16:22
Summary
Details

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. From version 3.4.0 through 3.4.12, the HTJ2K decoder parses a header-length field (PLEN) from a chunk's compressed data but never checks that this value fits within the available buffer before using it. When decoding, it advances the codestream pointer by the attacker-supplied header size and passes the resulting offset and remaining length to the OpenJPH memory-input path, so a crafted value pushes the pointer past the end of the buffer and causes an out-of-bounds read. Because this field comes straight from attacker-controlled EXR chunk data, the flaw is reachable during normal decoding of an untrusted file. This issue is fixed in version 3.4.13.

Severity
6.7 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/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 image format, widely used in the motion picture industry. From version 3.4.0 through 3.4.12, the HTJ2K decoder parses a header-length field (PLEN) from a chunk\u0027s compressed data but never checks that this value fits within the available buffer before using it. When decoding, it advances the codestream pointer by the attacker-supplied header size and passes the resulting offset and remaining length to the OpenJPH memory-input path, so a crafted value pushes the pointer past the end of the buffer and causes an out-of-bounds read. Because this field comes straight from attacker-controlled EXR chunk data, the flaw is reachable during normal decoding of an untrusted file. This issue is fixed in version 3.4.13.",
  "id": "UBUNTU-CVE-2026-65979",
  "modified": "2026-09-02T16:22:32Z",
  "published": "2026-08-25T19:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-65979"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-65979"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-3j9c-j7c9-x293"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/AcademySoftwareFoundation/openexr/commit/c7af2d233b7b2a4452c11f26cf47584cc2b35721"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-65979"
  ]
}



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