Use-After-Free Vulnerability in OpenEXR Affects Software Products by Academy Software Foundation
CVE-2025-64183

5.5MEDIUM

Key Information:

Vendor

Academysoftwarefoundation

Status
Openexr
Vendor
CVE Published:
10 November 2025

What is CVE-2025-64183?

A use-after-free vulnerability exists in the OpenEXR library’s Python interface, specifically within the PyObject_StealAttrString function implemented in pyOpenEXR_old.cpp. This flaw allows for a dangling pointer to be utilized after its memory has been deallocated, which can lead to accessing freed memory. As a result, applications that invoke APIs like PyLong_AsLong or PyFloat_AsDouble with these pointers may experience undefined behavior. The issue is present in various versions of OpenEXR, but has been patched in subsequent releases.

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Affected Version(s)

openexr >= 3.2.0, < 3.2.5 < 3.2.0, 3.2.5

openexr >= 3.3.0, < 3.3.6 < 3.3.0, 3.3.6

openexr >= 3.4.0, < 3.4.3 < 3.4.0, 3.4.3

References

https://github.com/AcademySoftwareFoundation/openexr/secu...
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https://github.com/AcademySoftwareFoundation/openexr/blob...
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CVSS V4

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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