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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.

PUBLISHED Reserved 2025-10-28 | Published 2025-11-10 | Updated 2025-11-12 | Assigner GitHub_M




LOW: 2.0CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

Problem types

CWE-457: Use of Uninitialized Variable

Product status

>= 3.3.0, < 3.3.6
affected

>= 3.4.0, < 3.4.3
affected

References

github.com/...penexr/security/advisories/GHSA-3h9h-qfvw-98hq exploit

github.com/...penexr/security/advisories/GHSA-3h9h-qfvw-98hq

github.com/user-attachments/files/23024726/archive0.zip

github.com/user-attachments/files/23024736/archive1.zip

github.com/user-attachments/files/23024740/archive2.zip

github.com/user-attachments/files/23024744/archive3.zip

github.com/user-attachments/files/23024746/archive4.zip

cve.org (CVE-2025-64181)

nvd.nist.gov (CVE-2025-64181)

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