{
  "cveId": "CVE-2026-55373",
  "url": "https://patchblox.com/security/cve/CVE-2026-55373",
  "summary": "CVE-2026-55373 is fixed in 13 products on 1 platform, first by SUSE-SU-2026:22653-1, released July 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "openexr: OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture...",
  "description": "OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. Versions prior to 3.2.10, 3.3.12, and 3.4.13 contain an infinite-loop vulnerability in SampleCountChannel. The helper roundListSizeUp() rounds a sample-list size up to the next power of two using repeated unsigned left shifts, which terminates for normal values but fails for UINT_MAX: the sequence reaches 0x80000000, and the next left shift wraps the 32-bit value to 0. Because 0 remains less than UINT_MAX, the loop never progresses and never exits. The bug is reachable through public OpenEXRUtil APIs, either by editing the sample-count buffer through SampleCountChannel::Edit (whose destructor calls endEdit()) or by calling SampleCountChannel::set(x, y, UINT_MAX) on a valid pixel. This issue has been fixed in versions 3.2.10, 3.3.12, and 3.4.13.",
  "published": "2026-07-14T08:39:20Z",
  "severity": "medium",
  "cvss": 6.2,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00157,
  "epssPercentile": 0.04919,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "mingw-openexr",
      "release": "Fedora 43",
      "fixedVersion": "3.3.14-1.fc43",
      "fix": "FEDORA-2026-BCC9AC580D",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-bcc9ac580d",
      "released": "2026-08-25T20:59:06Z"
    },
    {
      "platform": "linux",
      "product": "mingw32-openexr",
      "release": "Fedora 43",
      "fixedVersion": "3.3.14-1.fc43",
      "fix": "FEDORA-2026-BCC9AC580D",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-bcc9ac580d",
      "released": "2026-08-25T20:59:06Z"
    },
    {
      "platform": "linux",
      "product": "mingw32-openexr-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "3.3.14-1.fc43",
      "fix": "FEDORA-2026-BCC9AC580D",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-bcc9ac580d",
      "released": "2026-08-25T20:59:06Z"
    },
    {
      "platform": "linux",
      "product": "mingw32-openexr-tools",
      "release": "Fedora 43",
      "fixedVersion": "3.3.14-1.fc43",
      "fix": "FEDORA-2026-BCC9AC580D",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-bcc9ac580d",
      "released": "2026-08-25T20:59:06Z"
    },
    {
      "platform": "linux",
      "product": "mingw64-openexr",
      "release": "Fedora 43",
      "fixedVersion": "3.3.14-1.fc43",
      "fix": "FEDORA-2026-BCC9AC580D",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-bcc9ac580d",
      "released": "2026-08-25T20:59:06Z"
    },
    {
      "platform": "linux",
      "product": "mingw64-openexr-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "3.3.14-1.fc43",
      "fix": "FEDORA-2026-BCC9AC580D",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-bcc9ac580d",
      "released": "2026-08-25T20:59:06Z"
    },
    {
      "platform": "linux",
      "product": "mingw64-openexr-tools",
      "release": "Fedora 43",
      "fixedVersion": "3.3.14-1.fc43",
      "fix": "FEDORA-2026-BCC9AC580D",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-bcc9ac580d",
      "released": "2026-08-25T20:59:06Z"
    },
    {
      "platform": "linux",
      "product": "openexr",
      "release": "Debian 14",
      "fixedVersion": "3.4.14-0.1",
      "fix": "DEBIAN-CVE-2026-55373",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-55373",
      "released": "2026-08-28T00:36:15Z"
    },
    {
      "platform": "linux",
      "product": "openexr",
      "release": "amzn 2023",
      "fixedVersion": "3.1.5-1.amzn2023.0.12",
      "fix": "ALAS2023-2026-2154",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2154",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openexr",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.2.2-160000.9.1",
      "fix": "OPENSUSE-SU-2026:21336-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21336-1",
      "released": "2026-07-14T08:47:36Z"
    },
    {
      "platform": "linux",
      "product": "openexr",
      "release": "sles 15.7",
      "fixedVersion": "2.2.1-150000.3.52.1",
      "fix": "SUSE-SU-2026:3169-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-3169-1",
      "released": "2026-07-21T18:45:08Z"
    },
    {
      "platform": "linux",
      "product": "openexr",
      "release": "sles 16.0",
      "fixedVersion": "3.2.2-160000.9.1",
      "fix": "SUSE-SU-2026:22653-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22653-1",
      "released": "2026-07-14T08:39:20Z"
    },
    {
      "platform": "linux",
      "product": "openexr-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "3.1.5-1.amzn2023.0.12",
      "fix": "ALAS2023-2026-2154",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2154",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openexr-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "3.1.5-1.amzn2023.0.12",
      "fix": "ALAS2023-2026-2154",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2154",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openexr-devel",
      "release": "amzn 2023",
      "fixedVersion": "3.1.5-1.amzn2023.0.12",
      "fix": "ALAS2023-2026-2154",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2154",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openexr-libs",
      "release": "amzn 2023",
      "fixedVersion": "3.1.5-1.amzn2023.0.12",
      "fix": "ALAS2023-2026-2154",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2154",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openexr-libs-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "3.1.5-1.amzn2023.0.12",
      "fix": "ALAS2023-2026-2154",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2154",
      "released": "2026-09-14T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}