CVE-2026-43909OpenImageIO: Signed integer overflow in SwapRGBABytes loop index leads to out-of-bounds read/write in DPX ABGR decoder
Updated under an hour ago ()
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It affects AcademySoftwareFoundation OpenImageIO and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-125, CWE-190, CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- May 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
AcademySoftwareFoundation OpenImageIO academysoftwarefoundation:openimageio (from the name) | before 3.0.18.0; from 3.1.4.0-beta, < 3.1.13.0 | CNA record |
openimageio openimageio openimageio:openimageio | before 3.0.18.0; from 3.1.4.0 before 3.1.13.0; 3.2.0.0; 3.2.0.2 | NVD |
References
- https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-g267-j53j-5258x-refsource-confirm, exploit, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.