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CVE-2026-43904— OpenImageIO: Softimage PIC RLE decoder heap buffer overflow — longCount not clamped to image width

Quick assessment

Affected
AcademySoftwareFoundation OpenImageIO
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenImageIO是OpenImageIO开源的一个图像处理库。具有易于使用的界面和大量受支持的图像格式。 OpenImageIO 3.0.18.0之前版本和3.1.13.0之前版本存在缓冲区错误漏洞，该漏洞源于softimageinput.cpp中RLE路径未将运行长度限制为剩余扫描线宽度，导致堆溢出。

AI Predicted 8.5 Difficulty: Moderate EPSS 0.17% · P7

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 2

VendorProduct Version RangeStatus
AcademySoftwareFoundation OpenImageIO < 3.0.18.0 affected
>= 3.1.4.0-beta, < 3.1.13.0 affected
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I. Basic Information for CVE-2026-43904

Vulnerability Information
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Vulnerability Title
OpenImageIO: Softimage PIC RLE decoder heap buffer overflow — longCount not clamped to image width
Source: CVE Program / CVE List V5
Vulnerability 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, softimageinput.cpp:469 (mixed RLE) and :345 (pure RLE) do not clamp the run length to remaining scanline width before writing pixels. The raw packet path (line 403) correctly clamps with std::min, but RLE paths skip this check. A crafted .pic file causes heap overflow up to 65535 bytes. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
OpenImageIO 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenImageIO是OpenImageIO开源的一个图像处理库。具有易于使用的界面和大量受支持的图像格式。 OpenImageIO 3.0.18.0之前版本和3.1.13.0之前版本存在缓冲区错误漏洞，该漏洞源于softimageinput.cpp中RLE路径未将运行长度限制为剩余扫描线宽度，导致堆溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
AcademySoftwareFoundation OpenImageIO < 3.0.18.0 -

II. Public POCs for CVE-2026-43904

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III. Intelligence Information for CVE-2026-43904

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Vendor Advisories for CVE-2026-43904 (1)

Same Patch Batch · AcademySoftwareFoundation · 2026-05-14 · 8 CVEs total

CVE-2026-43908 8.8 HIGH OpenImageIO: Signed integer overflow in ConvertCbYCrYToRGB leads to heap out-of-bounds wri
CVE-2026-43909 8.8 HIGH OpenImageIO: Signed integer overflow in SwapRGBABytes loop index leads to out-of-bounds re
CVE-2026-43907 8.3 HIGH OpenImageIO: Integer overflow in QueryRGBBufferSizeInternal leads to heap out-of-bounds wr
CVE-2026-43996 5.5 MEDIUM OpenImageIO: Integer wraparound in bounds check of decode_pixel leads to out-of-bounds rea
CVE-2026-43903 OpenImageIO: SGI RLE decoder heap buffer overflow OIIO_DASSERT bounds checks are no-ops in
CVE-2026-43906 OpenImageIO: HEIF Heap overflow
CVE-2026-43905 OpenImageIO: JPEG2000 (OpenJPH) signed integer overflow in buffer allocation

IV. Related Vulnerabilities

Same product: OpenImageIO
Same vendor: AcademySoftwareFoundation
Same weakness: CWE-787

V. Comments for CVE-2026-43904

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