CVE-2025-64182

High

Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.2.0 through 3.2.4, 3.3.0 through 3.3.5, and 3.4.0 through 3.4.2, a memory safety bug in the legacy OpenEXR Python adapter (the deprecated OpenEXR.InputFile wrapper) allow crashes and likely code execution when opening attacker-controlled EXR files or when passing crafted Python objects. Integer overflow and unchecked allocation in InputFile.channel() and InputFile.channels() can lead to heap overflow (32 bit) or a NULL deref (64 bit). Versions 3.2.5, 3.3.6, and 3.4.3 contain a patch for the issue.

SeverityHigh
CVSS7.8
Exploit probability—
ProductOpenexr
PublishedNov 10, 2025
First seenNov 10, 2025
Weakness typeCWE-120CWE-120

How to fix

Update
  • openexr openexr3.2.5, 3.3.6, 3.4.3 or later
  • openexr3.2.5, 3.3.6, 3.4.3 or later

Affected products

ProductAffected versionsFixed in
openexr openexr3.2.0 ≤ v < 3.2.5, 3.3.0 ≤ v < 3.3.6, 3.4.0 ≤ v < 3.4.33.2.5, 3.3.6, 3.4.3
openexrPyPI3.2.0 ≤ v < 3.2.5, 3.3.0 ≤ v < 3.3.6, 3.4.0 ≤ v < 3.4.33.2.5, 3.3.6, 3.4.3

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CVE-2025-64182 · Openexr · Dark Radar