CVE-2026-43909
Description
OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, a signed 32-bit integer overflow in the loop index expression i * 4 inside SwapRGBABytes() causes the function to compute a large negative pointer offset when processing kABGR DPX images with large dimensions. The immediate crash is an out-of-bounds read (the memcpy at line 45 reads from &input[i * 4] first), but the subsequent write operations at lines 46–49 target the same wrapped offset — making this a combined OOB read+write primitive. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
How to fix
- openimageio openimageio3.0.18.0, 3.1.13.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openimageio openimageio | v < 3.0.18.0, 3.1.4.0 ≤ v < 3.1.13.0, 3.2.0.0, 3.2.0.2 | 3.0.18.0, 3.1.13.0 |
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