{
  "cveId": "CVE-2026-34380",
  "url": "https://patchblox.com/security/cve/CVE-2026-34380",
  "summary": "CVE-2026-34380 is fixed in 7 products on 1 platform, first by libopenexr-3-1-30 3.1.5-5.1ubuntu0.1~esm1, released April 6, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "openexr: OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for t...",
  "description": "OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, a signed integer overflow exists in undo_pxr24_impl() in src/lib/OpenEXRCore/internal_pxr24.c at line 377. The expression (uint64_t)(w * 3) computes w * 3 as a signed 32-bit integer before casting to uint64_t. When w is large, this multiplication constitutes undefined behavior under the C standard. On tested builds (clang/gcc without sanitizers), two\u0027s-complement wraparound commonly occurs, and for specific values of w the wrapped result is a small positive integer, which may allow the subsequent bounds check to pass incorrectly. If the check is bypassed, the decoding loop proceeds to write pixel data through dout, potentially extending far beyond the allocated output buffer. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.",
  "published": "2026-04-06T09:16:00Z",
  "severity": "medium",
  "cvss": 5.9,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H",
  "epss": 0.00265,
  "epssPercentile": 0.18512,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libopenexr-3-1-30",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.1.5-5.1ubuntu0.1~esm1",
      "fix": "libopenexr-3-1-30 3.1.5-5.1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libopenexr-3-1-30-3.1.5-5.1ubuntu0.1-esm1",
      "released": "2026-04-06T09:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libopenexr-3-1-30",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.1.13-2ubuntu0.26.04.1~esm1",
      "fix": "libopenexr-3-1-30 3.1.13-2ubuntu0.26.04.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libopenexr-3-1-30-3.1.13-2ubuntu0.26.04.1-esm1",
      "released": "2026-04-06T09:16:00Z"
    },
    {
      "platform": "linux",
      "product": "openexr",
      "release": "Debian 14",
      "fixedVersion": "3.4.14-0.1",
      "fix": "DEBIAN-CVE-2026-34380",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-34380",
      "released": "2026-04-06T16:16:35Z"
    },
    {
      "platform": "linux",
      "product": "openexr",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.1.5-5.1ubuntu0.1~esm1",
      "fix": "openexr 3.1.5-5.1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-openexr-3.1.5-5.1ubuntu0.1-esm1",
      "released": "2026-04-06T09:16:00Z"
    },
    {
      "platform": "linux",
      "product": "openexr",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.1.13-2ubuntu0.26.04.1~esm1",
      "fix": "openexr 3.1.13-2ubuntu0.26.04.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-openexr-3.1.13-2ubuntu0.26.04.1-esm1",
      "released": "2026-04-06T09:16:00Z"
    },
    {
      "platform": "linux",
      "product": "openexr",
      "release": "amzn 2023",
      "fixedVersion": "3.1.5-1.amzn2023.0.9",
      "fix": "ALAS2023-2026-1612",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1612",
      "released": "2026-04-27T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openexr",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.2.2-160000.6.1",
      "fix": "OPENSUSE-SU-2026:20605-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-20605-1",
      "released": "2026-04-22T10:03:51Z"
    },
    {
      "platform": "linux",
      "product": "openexr-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "3.1.5-1.amzn2023.0.9",
      "fix": "ALAS2023-2026-1612",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1612",
      "released": "2026-04-27T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openexr-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "3.1.5-1.amzn2023.0.9",
      "fix": "ALAS2023-2026-1612",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1612",
      "released": "2026-04-27T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openexr-devel",
      "release": "amzn 2023",
      "fixedVersion": "3.1.5-1.amzn2023.0.9",
      "fix": "ALAS2023-2026-1612",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1612",
      "released": "2026-04-27T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openexr-libs",
      "release": "amzn 2023",
      "fixedVersion": "3.1.5-1.amzn2023.0.9",
      "fix": "ALAS2023-2026-1612",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1612",
      "released": "2026-04-27T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openexr-libs-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "3.1.5-1.amzn2023.0.9",
      "fix": "ALAS2023-2026-1612",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1612",
      "released": "2026-04-27T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}