CVE-2026-43909 Details
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.
A signed 32-bit integer overflow vulnerability has been identified in OpenImageIO versions prior to 3.0.18.0 and 3.1.13.0. The issue arises in the SwapRGBABytes() function when processing kABGR DPX images with large dimensions. The loop index expression 'i * 4' overflows, causing the function to calculate a large negative pointer offset. This vulnerability results in an immediate out-of-bounds read, followed by out-of-bounds write operations, creating a combined out-of-bounds read and write primitive.
Users can upgrade to OpenImageIO versions 3.0.18.0 or 3.1.13.0 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 14, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-g267-j53j-5258 | CISA-ADP | ExploitVendor Advisory |
| https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-g267-j53j-5258 | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | [email protected] |
| CWE-190 | Integer Overflow or Wraparound | [email protected] |
| CWE-787 | Out-of-bounds Write | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| openimageio openimageio | < 3.0.18.0 >= 3.1.4.0, < 3.1.13.0 3.2.0.0 dev 3.2.0.2 dev |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 15, 2026 | Initial Analysis | [email protected] |
| May 14, 2026 | New CVE Received | [email protected] |
| May 14, 2026 | CVE Modified | CISA-ADP |