Application crash via uninitialized decode buffer
Published Nov 10, 2025 · Updated Nov 10, 2025
Use of uninitialized memory in OpenEXR 3.3.0 through 3.3.5 and 3.4.0 through 3.4.2 allows local users to crash an EXR-processing application. The exr_decoding_run path allocates a heap scratch buffer, an incomplete decode leaves bytes unwritten, and generic_unpack and related sinks branch on or consume those bytes. Exploitation requires processing a crafted EXR file; the demonstrated consequence is undefined behavior or an application crash, not data modification or code execution.
Summary
What happened
Use of uninitialized memory in OpenEXR 3.3.0 through 3.3.5 and 3.4.0 through 3.4.2 allows local users to crash an EXR-processing application. The exr_decoding_run path allocates a heap scratch buffer, an incomplete decode leaves bytes unwritten, and generic_unpack and related sinks branch on or consume those bytes. Exploitation requires processing a crafted EXR file; the demonstrated consequence is undefined behavior or an application crash, not data modification or code execution.
The record
- CVE
- CVE-2025-64181
- Published
- Nov 10, 2025
- Updated
- Nov 10, 2025
- Vendor
- Academy Software Foundation
- Product
- OpenEXR
- Classifications
- CWE-457, T1499.004
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 10, 2025CVE publishedPublication date reported by the CVE source.
- Nov 10, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 3.3.0, < 3.3.6
- Affected versionversion=>= 3.4.0, < 3.4.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Upstream single-file EXR proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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