CVE-2026-34589— OpenEXR: DWA Lossy Decoder Heap Out-of-Bounds Write
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I. Basic Information for CVE-2026-34589
Vulnerability Information
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Vulnerability Title
OpenEXR: DWA Lossy Decoder Heap Out-of-Bounds Write
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. From 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, the DWA lossy decoder constructs temporary per-component block pointers using signed 32-bit arithmetic. For a large enough width, the calculation overflows and later decoder stores operate on a wrapped pointer outside the allocated rowBlock backing store. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.
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 缓冲区错误漏洞
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 3.2.0至3.2.7之前版本、3.3.9之前版本和3.4.9之前版本存在缓冲区错误漏洞，该漏洞源于有符号整数算术溢出可能导致越界写入。
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, < 3.2.7 | - |
II. Public POCs for CVE-2026-34589
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|---|
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- Release v3.3.9 · AcademySoftwareFoundation/openexr · GitHubx_refsource_MISC
- Release v3.4.9 · AcademySoftwareFoundation/openexr · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-34589
Same Patch Batch · AcademySoftwareFoundation · 2026-04-06 · 5 CVEs total
| CVE-2026-34379 | 7.1 HIGH | OpenEXR has a misaligned write in LossyDctDecoder_execute leading to undefined behavior (D |
| CVE-2026-34378 | 6.5 MEDIUM | OpenEXR has a signed integer overflow in generic_unpack() when parsing EXR files with craf |
| CVE-2026-34380 | 5.9 MEDIUM | OpenEXR has a signed integer overflow (undefined behavior) in undo_pxr24_impl may allow bo |
| CVE-2026-34588 | OpenEXR has a signed 32-bit Overflow in PIZ Decoder Leads to OOB Read/Write |
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-2026-40250
OpenEXR has integer overflow in DWA decoder outBufferEnd poi - CVE-2026-40244
OpenEXR has integer overflow in DWA setupChannelData planarU
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-2026-40250
OpenEXR has integer overflow in DWA decoder outBufferEnd poi
Same weakness: CWE-190
- CVE-2026-7568
Signed integer overflow in metaphone() - CVE-2026-42311
Pillow: OOB Write with Invalid PSD Tile Extents (Integer Ove - CVE-2026-42308
Pillow: Integer overflow when processing fonts - CVE-2026-6664
PgBouncer integer overflow in PgBouncer network packet parsi - CVE-2026-42199
Grid: Integer Overflow in Grid::expand_rows Leads to Safe-AP
V. Comments for CVE-2026-34589
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