CVE-2026-42217
CriticalSummary
OpenEXR versions from 3.0.0 to before 3.2.9, 3.3.0 to before 3.3.11, and 3.4.0 to before 3.4.11 have an issue with the readVariableLengthInteger() function that decodes a variable-length integer from untrusted EXR input without bounding the shift count. After enough continuation bytes, the code executes a left shift by 70 on a 64-bit value, leading to undefined behavior.
Risk Assessment
Exploitation of this vulnerability may lead to unpredictable errors in applications using OpenEXR, potentially affecting system stability and data security.
Recommendation
It is recommended to upgrade to versions 3.2.9, 3.3.11, or 3.4.11, where the issue has been patched.
Original NVD description (English source)
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From versions 3.0.0 to before 3.2.9, 3.3.0 to before 3.3.11, and 3.4.0 to before 3.4.11, readVariableLengthInteger() decodes a variable-length integer from untrusted EXR input without bounding the shift count. After enough continuation bytes, the code executes a left shift by 70 on a 64-bit value, which is undefined behavior. This issue has been patched in versions 3.2.9, 3.3.11, and 3.4.11.