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CVE-2025-64181

OpenEXR Makes Use of Uninitialized Memory

Published: 11/10/2025 Last updated: 11/12/2025 Reserved: 10/28/2025

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.

CNA assigner: GitHub_M (a0819718-46f1-4df5-94e2-005712e83aaa) Requested by: n/a

Metrics

Version Score Severity Vector String
4.0 2 Low CVSS: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

Opam packages affected (1)

conf-openimageio

Products affected (2)

Product Vendor Version
openexr AcademySoftwareFoundation < publication
openexr AcademySoftwareFoundation < V3.0.0

References (14)