Heap-based Buffer Overflow Affecting openexr package, versions [3.3.0,3.3.6)[3.4.2,3.4.3)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published30 Dec 2025
- disclosed23 Dec 2025
- creditUnknown
Introduced: 23 Dec 2025
CVE-2025-12839 (opens in a new tab)How to fix?
Upgrade openexr to version 3.3.6, 3.4.3 or higher.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow in the parsing process of EXR files due to improper validation of user-supplied data length. An attacker can achieve arbitrary code execution by tricking a user into opening a specially crafted malicious EXR file.
Workaround
This vulnerability can be mitigated by exercising caution when handling untrusted EXR files and running applications that process EXR files within a sandboxed environment.