CVE-2026-43996
Last modified
CVE-2026-43996 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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, the bounds check in TGAInput::decode_pixel computes k + palbytespp as unsigned 32-bit arithmetic. EPSS estimates a 0.18% chance of exploitation in the next 30 days.
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, the bounds check in TGAInput::decode_pixel computes k + palbytespp as unsigned 32-bit arithmetic. When k = 0xFFFFFFFC and palbytespp = 4, the addition wraps to 0, which compares less than palette_alloc_size and passes the check. The subsequent palette access uses the unwrapped k (0xFFFFFFFC) as the index, reading ~4 GB past the start of the palette buffer — SEGV. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Openimageio | Openimageio | < 3.0.18.0 | — |
| Openimageio | Openimageio | >= 3.1.0.0, < 3.1.13.0 | — |
| Openimageio | Openimageio | 3.2.0.0 | Dev |
| Openimageio | Openimageio | 3.2.0.2 | Dev |
References
- https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-mq8j-73c4-cr55Exploit, Vendor Advisory
- https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-mq8j-73c4-cr55Exploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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