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5.5 Medium

CVE-2025-64183 OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for…

Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.2.0 through 3.2.4, 3.3.0 through 3.3.5, and 3.4.0 through 3.4.2, there is a use-after-free in PyObject_StealAttrString of pyOpenEXR_old.cpp. The legacy adapter defines PyObject_StealAttrString that calls PyObject_GetAttrString to obtain a new reference, immediately decrefs it, and returns the pointer. Callers then pass this dangling pointer to APIs like PyLong_AsLong/PyFloat_AsDouble, resulting in a use-after-free. This is invoked in multiple places (e.g., reading PixelType.v, Box2i, V2f, etc.) Versions 3.2.5, 3.3.6, and 3.4.3 fix the issue.

Affected products and versions

Product Affected versions Fixed in
openexr 3.4 3.4.0 → < 3.4.3 3.4.3
openexr 3.3 3.3.0 → < 3.3.6 3.3.6
openexr 3.2 3.2.0 → < 3.2.5 3.2.5

Other CVEs of openexr

The 47 CVEs of openexr →
CVE-2026-59981 OpenEXR is the reference implementation and specification for the EXR image file format, widely used in the motion… 7.1 High CVE-2026-68514 OpenEXR is the reference implementation and specification for the EXR image file format, widely used in the motion… 5.5 Medium CVE-2026-68515 OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture… 7.1 High CVE-2026-68513 OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture… 7.1 High
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