cve.bz

CVE-2025-64181

2.0 lowEPSS 0.4%

Low (2.0) in openexr openexr. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in openexr 3.3.6, 3.4.3.

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.

Severity

CVSS 4.0

2.0 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

CVSS 3.1

7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
0.4% chance of exploitation in the next 30 days; higher than 35% of CVEs (scores of 2026-10-31)
CWE
CWE-457
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-3h9h-qfvw-98hqPyPIopenexr>=3.3.0 <3.3.63.3.6
GHSA-3h9h-qfvw-98hqPyPIopenexr>=3.4.0 <3.4.33.4.3
PYSEC-2026-2843PyPIopenexr>=3.3.0 <3.3.6
>=3.4.0 <3.4.3		3.3.6, 3.4.3

References

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