AIKIDO-2026-10406
OpenEXR is vulnerable to Integer Overflow
54
Medium Risk
This Affects:
OpenEXRTL;DR
OpenEXR's HTJ2K decoder in internal_ht.cpp uses a loop variable typed as int16_t when iterating over channel width in ht_undo_impl. For very wide images (width > 32767), the variable overflows, leading to undefined behavior and potentially to out-of-bounds writes or denial of service when decoding attacker-supplied or untrusted EXR files that use HTJ2K compression. The fix changes the loop iterators to int32_t so widths beyond 32767 are handled correctly.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
OpenEXR is vulnerable to Integer Overflow in versions 3.4.0 - 3.4.6.
How to fix this
Upgrade the OpenEXR library to the patch version.
Are You Affected?
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