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DEBIAN-CVE-2026-34380

Type: advisorySource: OSV1 source record

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's-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.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-34380

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-34380

openexr

Source reference: /affected/0/package/name

Affected versions
3.1.13-1

Source reference: /affected/0/versions

3.1.13-2

Source reference: /affected/0/versions

3.1.5-5

Source reference: /affected/0/versions

3.1.5-5.1

Source reference: /affected/0/versions

3.1.5-5.1+hurd.1

Source reference: /affected/0/versions

3.4.14-0.1

Source reference: /affected/0/versions

3.4.15+ds-1

Source reference: /affected/0/versions

3.4.6+ds-1

Source reference: /affected/0/versions

3.4.6+ds-2

Source reference: /affected/0/versions

3.4.6+ds-3

Source reference: /affected/0/versions

3.4.6+ds-4

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

openexr

Source reference: /affected/1/package/name

Affected versions
3.1.13-2

Source reference: /affected/1/versions

3.4.14-0.1

Source reference: /affected/1/versions

3.4.15+ds-1

Source reference: /affected/1/versions

3.4.6+ds-1

Source reference: /affected/1/versions

3.4.6+ds-2

Source reference: /affected/1/versions

3.4.6+ds-3

Source reference: /affected/1/versions

3.4.6+ds-4

Source reference: /affected/1/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

openexr

Source reference: /affected/2/package/name

Affected versions
3.1.13-2

Source reference: /affected/2/versions

3.4.6+ds-1

Source reference: /affected/2/versions

3.4.6+ds-2

Source reference: /affected/2/versions

3.4.6+ds-3

Source reference: /affected/2/versions

3.4.6+ds-4

Source reference: /affected/2/versions

Fixed versions
3.4.14-0.1

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "openexr",
      "purl": "pkg:deb/debian/openexr?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "3.1.13-1",
      "3.1.13-2",
      "3.1.5-5",
      "3.1.5-5.1",
      "3.1.5-5.1+hurd.1",
      "3.4.14-0.1",
      "3.4.15+ds-1",
      "3.4.6+ds-1",
      "3.4.6+ds-2",
      "3.4.6+ds-3",
      "3.4.6+ds-4"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34380.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "openexr",
      "purl": "pkg:deb/debian/openexr?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "3.1.13-2",
      "3.4.14-0.1",
      "3.4.15+ds-1",
      "3.4.6+ds-1",
      "3.4.6+ds-2",
      "3.4.6+ds-3",
      "3.4.6+ds-4"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34380.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.4.14-0.1"
          }
        ]
      }
    ],
    "package": {
      "name": "openexr",
      "purl": "pkg:deb/debian/openexr?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.1.13-2",
      "3.4.6+ds-1",
      "3.4.6+ds-2",
      "3.4.6+ds-3",
      "3.4.6+ds-4"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34380.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#57537 · Revision 1
Added to Heist Feed
Publisher date
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