CVE-2025-64181

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.3.0 through 3.3.5 and 3.4.0 through 3.4.2, while fuzzing `openexr_exrcheck_fuzzer`, Valgrind reports a conditional branch depending on uninitialized data inside `generic_unpack`. This indicates a use of uninitialized memory. The issue can result in undefined behavior and/or a potential crash/denial of service. Versions 3.3.6 and 3.4.3 fix the issue.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-457

Affected software

Vendor	Product	Versions
AcademySoftwareFoundation	openexr	>= 3.3.0, < 3.3.6; >= 3.4.0, < 3.4.3

References

https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-3h9h-qfvw-98hqExploit, Vendor Advisory
https://github.com/user-attachments/files/23024726/archive0.zipBroken Link
https://github.com/user-attachments/files/23024736/archive1.zipBroken Link
https://github.com/user-attachments/files/23024740/archive2.zipBroken Link
https://github.com/user-attachments/files/23024744/archive3.zipBroken Link
https://github.com/user-attachments/files/23024746/archive4.zipBroken Link
https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-3h9h-qfvw-98hqExploit, Vendor Advisory

Timeline

Published: Nov 10, 2025
Last modified: Jun 17, 2026
NVD status: Analyzed

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