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CVE-2026-68515— OpenEXR: Heap out-of-bounds write in exrmultiview with subsampled channel union

Quick assessment

Affected
AcademySoftwareFoundation openexr
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenEXR 是 EXR 图像格式的参考实现及规范，在影视行业中被广泛使用。在版本 3.2.11 之前、3.3.0 至 3.3.12 以及 3.4.0 至 3.4.13 中， 工具在合并两个由攻击者提供的、各自合法的单扫描行 EXR 文件时，若其联合数据窗口（union dataWindow）未对齐到某个视图的通道采样率（channel subsampling），则可能导致堆缓冲区越界写入。该工具通过截断计算得到的 来分配采样通道存储空间，随后基于未对齐的联合窗口读取采样输入切片（Slice），从而引发堆越界写入

CVSS 7.1 · High EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-68515

Vulnerability Information
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Vulnerability Title
OpenEXR: Heap out-of-bounds write in exrmultiview with subsampled channel union
Source: CVE Program / CVE List V5
Vulnerability Description
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions before 3.2.11, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13, exrmultiview can write past a heap allocation when it combines two attacker-supplied, individually valid scanline EXR files whose union dataWindow is not aligned to one view's channel subsampling. The utility allocates sampled channel storage using a truncated union_width / xSampling, then reads the sampled input through a Slice based on the misaligned union window, producing a heap out-of-bounds write. The trigger is normal public-tool processing, such as exrmultiview left A.exr right B.exr out.exr with crafted but valid inputs, so this is not solely an API or caller-precondition issue. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
AcademySoftwareFoundation openexr >= 3.3.0, < 3.3.13 -

II. Public POCs for CVE-2026-68515

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Qwen3.6-35B-A3B · 10458 chars
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III. Intelligence Information for CVE-2026-68515

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Patches & Fixes for CVE-2026-68515 (3)

Vendor Advisories for CVE-2026-68515 (1)

Same Patch Batch · AcademySoftwareFoundation · 2026-08-25 · 20 CVEs total

CVE-2026-59982 7.1 HIGH OpenEXR: DWAA InputFile AC buffer overflow on ILP32 platforms
CVE-2026-59981 7.1 HIGH OpenEXR: Heap OOB read in SampleCountChannel row when using nonzero dataWindow
CVE-2026-68513 7.1 HIGH OpenEXR: Heap buffer overflow in PyOpenEXR from literal/prefixed RGB channel name collisio
CVE-2026-59189 7.1 HIGH OpenEXR: Out-of-bounds read in DeepImageChannel::row() for non-zero dataWindow origin
CVE-2026-59187 7.1 HIGH OpenEXR: exrmetrics deep pixelmode heap buffer overflow
CVE-2026-59186 7.1 HIGH OpenEXR: Heap out-of-bounds write in TiledRgbaInputFile via integer overflow on 32-bit (IL
CVE-2026-59184 7.1 HIGH OpenEXR: OpenEXRUtil FlatImageChannel row nonzero dataWindow heap OOB write
CVE-2026-55371 6.9 MEDIUM OpenEXR: OpenEXRCore exr_attr_set_bytes() accepts NULL type_hint with positive hint_length
CVE-2026-65979 6.7 MEDIUM OpenEXR: Out-of-bounds read in HTJ2K decoder from unvalidated chunk header length (PLEN)
CVE-2026-55373 6.2 MEDIUM OpenEXR: OpenEXRUtil SampleCountChannel endEdit() can loop forever on UINT_MAX sample coun
CVE-2026-55059 6.1 MEDIUM OpenEXR: OpenEXRUtil SampleCountChannel row setter heap has an out-of-bounds write vulnera
CVE-2026-59984 5.5 MEDIUM OpenEXR: Scratch buffer overflow decoding B44-compressed InputFile on ILP32
CVE-2026-59983 5.5 MEDIUM OpenEXR: Out-of-bounds read in DeepTiledInputFile sample-count table decode on ILP32
CVE-2026-59985 5.5 MEDIUM OpenEXR: Heap out-of-bounds read in OpenEXRCore RLE decoding on ILP32
CVE-2026-61555 5.5 MEDIUM OpenEXR: Empty multiView viewFromChannelName file crash
CVE-2026-68514 5.5 MEDIUM OpenEXR: Heap buffer overflow in PyOpenEXR from literal/prefixed RGB channel name collisio
CVE-2026-59183 5.5 MEDIUM OpenEXR: Signed Integer Overflow Leading to Out-of-Bounds Memory Access in Deep Tile Decod
CVE-2026-62986 4.3 MEDIUM OpenEXR: PyOpenEXR deep prefixed RGB stale lane disclosure
CVE-2026-54920 OpenEXR: Integer overflow and uninitialized pointer cause invalid delete in OpenEXRUtil im

IV. Related Vulnerabilities

Same product: openexr
Same vendor: AcademySoftwareFoundation
Same weakness: CWE-122

V. Comments for CVE-2026-68515

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