{
  "cveId": "CVE-2026-34379",
  "url": "https://patchblox.com/security/cve/CVE-2026-34379",
  "summary": "CVE-2026-34379 is fixed in openexr on 1 platform, first by DEBIAN-CVE-2026-34379, released April 6, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "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 misaligned memory write vulnerability exists in LossyDctDecoder_execute() in src/lib/OpenEXRCore/internal_dwa_decoder.h:749. When decoding a DWA or DWAB-compressed EXR file containing a FLOAT-type channel, the decoder performs an in-place HALF\u2192FLOAT conversion by casting an unaligned uint8_t * row pointer to float * and writing through it. Because the row buffer may not be 4-byte aligned, this constitutes undefined behavior under the C standard and crashes immediately on architectures that enforce alignment (ARM, RISC-V, etc.). On x86 it is silently tolerated at runtime but remains exploitable via compiler optimizations that assume aligned access. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.",
  "published": "2026-04-06T16:16:35Z",
  "severity": "high",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H",
  "epss": 0.00294,
  "epssPercentile": 0.22235,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "openexr",
      "release": "Debian 14",
      "fixedVersion": "3.4.14-0.1",
      "fix": "DEBIAN-CVE-2026-34379",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-34379",
      "released": "2026-04-06T16:16:35Z"
    },
    {
      "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"
    }
  ],
  "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"
  }
}