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CVE-2026-34544

CVE-2026-34544 · OpenEXR: integer overflow to OOB write in uncompress_b44_impl()

This page contains facts from public vulnerability sources. Check the original advisory before updating.

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From version 3.4.0 to before version 3.4.8, a crafted B44 or B44A EXR file can cause an out-of-bounds write in any application that decodes it via exr_decoding_run(). Consequences range from immediate crash (most likely) to corruption of adjacent heap allocations (layout-dependent). This issue has been patched in version 3.4.8.

CVSS 8.4 · High · EPSS 0.3% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • openexr

    Versions
    • >= 3.4.0, < 3.4.8: Affected

    No fix published

  • openexr 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
    • 3.4.16+ds-1
    • 3.4.6+ds-1
    • 3.4.6+ds-2
    • 3.4.6+ds-3
    • 3.4.6+ds-4
    • 3.5.2+ds-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • openexr Debian:13

    Versions
    • 3.1.13-2
    • 3.4.14-0.1
    • 3.4.15+ds-1
    • 3.4.16+ds-1
    • 3.4.6+ds-1
    • 3.4.6+ds-2
    • 3.4.6+ds-3
    • 3.4.6+ds-4
    • 3.5.2+ds-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • openexr 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
    Affected ranges
    • ECOSYSTEM: < 3.4.14-0.1

    Update to 3.4.14-0.1

  • openexr PyPI

    Versions
    • 3.4.0
    • 3.4.1
    • 3.4.2
    • 3.4.3
    • 3.4.4
    • 3.4.5
    • 3.4.6
    • 3.4.7
    Affected ranges
    • ECOSYSTEM: ≥ 3.4.0, < 3.4.8

    Update to 3.4.8

  • openexr PyPI

    Versions
    • 3.3.0
    • 3.3.1
    • 3.3.2
    • 3.3.3
    • 3.3.4
    • 3.3.5
    • 3.3.6
    • 3.3.7
    • 3.3.8
    Affected ranges
    • ECOSYSTEM: ≥ 3.3.0, ≤ 3.3.8

    No fix published

  • openexr PyPI

    Versions
    • 3.2.3
    • 3.2.4
    • 3.2.5
    • 3.2.6
    Affected ranges
    • ECOSYSTEM: ≥ 3.2.0, ≤ 3.2.6

    No fix published

  • openexr PyPI

    Versions
    • 3.2.10
    • 3.2.3
    • 3.2.4
    • 3.2.5
    • 3.2.6
    • 3.2.7
    • 3.2.8
    • 3.2.9
    • 3.3.0
    • 3.3.1
    • 3.3.10
    • 3.3.11
    • 3.3.12
    • 3.3.2
    • 3.3.3
    • 3.3.4
    • 3.3.5
    • 3.3.6
    • 3.3.7
    • 3.3.8
    • 3.3.9
    • 3.4.0
    • 3.4.1
    • 3.4.2
    • 3.4.3
    • 3.4.4
    • 3.4.5
    • 3.4.6
    • 3.4.7
    Affected ranges
    • ECOSYSTEM: ≥ 3.2.0, < 3.4.8

    Update to 3.4.8

  • openexr Ubuntu:26.10

    Versions
    • 3.1.13-2build1
    • 3.4.6+ds-4ubuntu3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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