EUVD-2026-19303CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
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3Description
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in generic_unpack(). By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9.
Analysis
Integer overflow in OpenEXR 3.4.0-3.4.8 allows remote attackers to crash applications processing malicious EXR files via a negative dataWindow.min.x value in the file header, triggering a signed integer overflow in generic_unpack() that causes process termination with SIGILL. The vulnerability requires user interaction (opening a crafted file) and affects availability only, with no confirmed active exploitation at time of analysis.
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