CVE-2026-40250— OpenEXR has integer overflow in DWA decoder outBufferEnd pointer arithmetic (missed variant of CVE-2026-34589)
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I. Basic Information for CVE-2026-40250
Vulnerability Information
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Vulnerability Title
OpenEXR has integer overflow in DWA decoder outBufferEnd pointer arithmetic (missed variant of CVE-2026-34589)
Source: NVD (National Vulnerability Database)
Vulnerability Description
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.4.0 through 3.4.9, 3.3.0 through 3.3.9, and 3.2.0 through 3.2.7, `internal_dwa_compressor.h:1040` performs `chan->width * chan->bytes_per_element` in `int32` arithmetic without a `(size_t)` cast. This is the same overflow pattern fixed in other decoders by CVE-2026-34589/34588/34544, but this line was missed. Versions 3.4.10, 3.3.10, and 3.2.8 contain a fix that addresses `internal_dwa_compressor.h:1040`.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
整数溢出或超界折返
Source: NVD (National Vulnerability Database)
Vulnerability Title
OpenEXR 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenEXR是Academy Software Foundation开源的一种高动态范围图像（HDR）文件格式的开放标准。 OpenEXR 3.4.0版本至3.4.9版本、3.3.0版本至3.3.9版本和3.2.0版本至3.2.7版本存在输入验证错误漏洞，该漏洞源于internal_dwa_compressor.h:1040行在int32算术中执行chan->width * chan->bytes_per_element运算时未进行(size_t)强制转换，可能导致整数溢出。
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 | openexr | >= 3.2.0, < 3.2.8 | - |
II. Public POCs for CVE-2026-40250
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|---|
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Same Patch Batch · AcademySoftwareFoundation · 2026-04-21 · 3 CVEs total
| CVE-2026-39886 | 5.3 MEDIUM | OpenEXR has HTJ2K Signed Integer Overflow in ht_undo_impl() |
| CVE-2026-40244 | OpenEXR has integer overflow in DWA setupChannelData planarUncRle pointer arithmetic (miss |
IV. Related Vulnerabilities
Same product: openexr
- CVE-2026-42217
OpenEXR: Shift exponent overflow in `readVariableLengthInteg - CVE-2026-42216
OpenEXR: Out-of-bounds read in `IDManifest::init()` during p - CVE-2026-41142
OpenEXR is Vulnerable to Integer overflow in ImageChannel::r - CVE-2026-40244
OpenEXR has integer overflow in DWA setupChannelData planarU - CVE-2026-39886
OpenEXR has HTJ2K Signed Integer Overflow in ht_undo_impl()
Same vendor: AcademySoftwareFoundation
- CVE-2026-42217
OpenEXR: Shift exponent overflow in `readVariableLengthInteg - CVE-2026-42216
OpenEXR: Out-of-bounds read in `IDManifest::init()` during p - CVE-2026-41142
OpenEXR is Vulnerable to Integer overflow in ImageChannel::r - CVE-2026-7582
AcademySoftwareFoundation OpenImageIO DDS Image ddsinput.cpp - CVE-2026-40244
OpenEXR has integer overflow in DWA setupChannelData planarU
Same weakness: CWE-190
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Signed integer overflow in metaphone() - CVE-2026-42311
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Pillow: Integer overflow when processing fonts - CVE-2026-6664
PgBouncer integer overflow in PgBouncer network packet parsi - CVE-2026-42199
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V. Comments for CVE-2026-40250
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