CVE catalog

CVE-2026-44663

OpenEXR is the reference implementation and…

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions 3.4.0 through 3.4.11, an integer overflow in ht_undo_impl() in src/lib/OpenEXRCore/internal_ht.cpp leads to a heap-buffer overflow when decoding a crafted HTJ2K-compressed EXR file. decode->channels[i].width (int32_t) is multiplied by bytes_per_element in 32-bit signed arithmetic. With large widths (e.g., >= 536870912 for FLOAT data), this overflows, producing a corrupted offset that is later used for pointer arithmetic and can cause a heap out-of-bounds write. The same unchecked multiplication pattern appears in two other HTJ2K paths (bytes-per-line accumulation and pixel-line pointer advancement). As with related CVE-2026-34378 through CVE-2026-34589 fixes in other codecs, validating only after the multiplication is too late because the value may already be overflowed. This issue has been fixed in version 3.4.12.

Severity: Medium · CVSS 6.1CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Published: Jun 9, 2026, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.21% · Oct 27, 2026

Projects and upstream resources

[imath][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence

Original provider fields

{
  "package_releases": [
    {
      "name": "openexr",
      "status": "fixed",
      "release": "sid",
      "version": "3.4.16+ds-1"
    },
    {
      "name": "openexr",
      "status": "fixed",
      "release": "forky",
      "version": "3.4.16+ds-1"
    },
    {
      "name": "openexr",
      "status": "not affected",
      "release": "trixie",
      "version": "3.1.13-2"
    },
    {
      "name": "openexr",
      "status": "not affected",
      "release": "bookworm",
      "version": "3.1.5-5"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "openexr",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "3.4.14-0.1"
    },
    {
      "bug": null,
      "name": "openexr",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "3.4.14-0.1"
    },
    {
      "bug": null,
      "name": "openexr",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "openexr",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "unimportant",
      "fixed_version": "0"
    }
  ],
  "distribution_packages": [
    {
      "name": "openexr",
      "ecosystem": "cpe",
      "fixed_version": "3.4.12"
    },
    {
      "name": "openexr",
      "distro": "opensuse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.4.12-1.1"
            }
          ]
        }
      ],
      "release": "tumbleweed",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "3.4.12-1.1",
      "provider_record_id": "OPENSUSE-SU-2026:10985-1"
    },
    {
      "name": "openexr",
      "ranges": [
        {
          "fixed": "3.4.12",
          "introduced": "3.4.0",
          "last_affected": "",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "fixed_version": "3.4.12",
      "provider_record_id": "NVD-CVE-2026-44663"
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[libopenexr-3-1-30]Unknown
Source package: [openexr]
Details (2)
- 3.1.5-5 · amd64 · bookworm
  Not affected
  nvd · openexr · debian · bookworm
- 3.1.5-5 · arm64 · bookworm
  Not affected
  nvd · openexr · debian · bookworm
[libopenexr-dev]Unknown
Source package: [openexr]
Details (2)
- 3.1.5-5 · amd64 · bookworm
  Not affected
  nvd · openexr · debian · bookworm
- 3.1.5-5 · arm64 · bookworm
  Not affected
  nvd · openexr · debian · bookworm
[libopenexr-doc]Unknown
Source package: [openexr]
Details (2)
- 3.1.5-5 · all · bookworm
  Not affected
  nvd · openexr · debian · bookworm
- 3.1.5-5 · all · bookworm
  Not affected
  nvd · openexr · debian · bookworm
[openexr]Unknown
Details (2)
- 3.1.5-5 · amd64 · bookworm
  Not affected
  nvd · openexr · debian · bookworm
- 3.1.5-5 · arm64 · bookworm
  Not affected
  nvd · openexr · debian · bookworm

[openSUSE Tumbleweed]

[libIex-3_4-33]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.12-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libIex-3_4-33-32bit]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.12-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libIex-3_4-33-x86-64-v3]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.12-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libIlmThread-3_4-33]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.12-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libIlmThread-3_4-33-32bit]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.12-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libIlmThread-3_4-33-x86-64-v3]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.12-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libOpenEXR-3_4-33]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.12-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libOpenEXR-3_4-33-32bit]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.12-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libOpenEXR-3_4-33-x86-64-v3]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.12-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libOpenEXRCore-3_4-33]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.12-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libOpenEXRCore-3_4-33-32bit]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.12-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libOpenEXRCore-3_4-33-x86-64-v3]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.12-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libOpenEXRUtil-3_4-33]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.12-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libOpenEXRUtil-3_4-33-32bit]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.12-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libOpenEXRUtil-3_4-33-x86-64-v3]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.12-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[openexr]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Fixed · Fixed: 3.4.12-1.1
  nvd · openexr · opensuse · tumbleweed

Next results

Observed: Oct 26, 2026, 12:30:05 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]