AcademySoftwareFoundation OpenEXR up to 3.2.7/3.3.9/3.4.9 EXR File internal_dwa_compressor.h integer overflow

Summaryinfo

A vulnerability described as critical has been identified in AcademySoftwareFoundation OpenEXR up to 3.2.7/3.3.9/3.4.9. This issue affects some unknown processing of the file internal_dwa_compressor.h of the component EXR File Handler. Executing a manipulation can lead to integer overflow. The identification of this vulnerability is CVE-2026-40244. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in AcademySoftwareFoundation OpenEXR up to 3.2.7/3.3.9/3.4.9 and classified as critical. This vulnerability affects an unknown code block of the file internal_dwa_compressor.h of the component EXR File Handler. The manipulation with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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:1722` performs `curc->width * curc->height` in `int32` arithmetic without a `(size_t)` cast. This is the same overflow pattern fixed in other locations by the recent CVE-2026-34589 batch, 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:1722`.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-40244 since 04/10/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 313674 (SUSE SLED15 / SLES15 Security Update : openexr (SUSE-SU-2026:1712-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.2.8, 3.3.10 or 3.4.10 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (313674). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• AcademySoftwareFoundation

Name

• OpenEXR

Version

• 3.2.0
• 3.2.1
• 3.2.2
• 3.2.3
• 3.2.4
• 3.2.5
• 3.2.6
• 3.2.7
• 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
• 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
• 3.4.8
• 3.4.9

License

• open-source

Website

• Product: https://github.com/AcademySoftwareFoundation/openexr/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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