Code execution via unchecked EXR data length
Published Dec 23, 2025 · Updated Dec 23, 2025
Heap-based buffer overflow in Academy Software Foundation OpenEXR 3.4.0 allows remote attackers to execute code via a crafted EXR file. The EXR parser copies user-supplied data into a heap buffer without first validating that the supplied length fits the destination. Exploitation requires a target process to parse the malicious file, typically after a user opens it or visits content that loads it, and code runs in that process context.
Summary
What happened
Heap-based buffer overflow in Academy Software Foundation OpenEXR 3.4.0 allows remote attackers to execute code via a crafted EXR file. The EXR parser copies user-supplied data into a heap buffer without first validating that the supplied length fits the destination. Exploitation requires a target process to parse the malicious file, typically after a user opens it or visits content that loads it, and code runs in that process context.
The record
- CVE
- CVE-2025-12495
- Published
- Dec 23, 2025
- Updated
- Dec 23, 2025
- Vendor
- Academy Software Foundation
- Product
- OpenEXR
- Classifications
- CWE-122, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 23, 2025CVE publishedPublication date reported by the CVE source.
- Dec 23, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=3.4.0
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.
Public exploit references
No public exploit references are available in this record.
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
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo