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CVE-2026-40250

OpenEXR has integer overflow in DWA decoder outBufferEnd pointer arithmetic (missed variant of CVE-2026-34589) PUBLISHED

Description (CNA)

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.4.0 through 3.4.9, 3.3.0 through 3.3.9, and 3.2.0 through 3.2.7, `internal_dwa_compressor.h:1040` performs `chan->width * chan->bytes_per_element` in `int32` arithmetic without a `(size_t)` cast. This is the same overflow pattern fixed in other decoders by CVE-2026-34589/34588/34544, but this line was missed. Versions 3.4.10, 3.3.10, and 3.2.8 contain a fix that addresses `internal_dwa_compressor.h:1040`.

Affected (CNA)

Vendor / productVersions
AcademySoftwareFoundation / openexraffected >= 3.2.0, < 3.2.8; affected >= 3.3.0, < 3.3.10; affected >= 3.4.0, < 3.4.10

CWE

CWE-190

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.