CVE-2026-55371 - OpenEXR: OpenEXRCore exr_attr_set_bytes() accepts NULL type_hint with positive hint_length
Brief
CVE ID : CVE-2026-55371
Published : Aug. 25, 2026, 12:31 a. m.
- 40 minutes ago
Description : OpenEXR is the reference implementation and specification for the EXR high-dynamic-range image file format, widely used in the motion picture industry. Versions 3.
- 0 through 3.
- 12 contain a NULL pointer dereference in the OpenEXRCore function exr_attr_set_bytes().
The public setter validates the top-level exr_attr_bytes_t value pointer but does not verify that the nested type_hint pointer is non-NULL when hint_length is greater than zero. When a caller supplies a positive hint_length together with a NULL type_hint, exr_attr_bytes_create() allocates a destination type-hint buffer and then copies from the NULL source pointer, causing a deterministic crash.
The flaw is reachable through the public OpenEXRCore C API and results in a denial of service. The issue is fixed in version 3. 4.