EUVD-2026-65744Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Local CLI tool invocable without elevated privileges (PR:N, AV:L); user must actively run exrmultiview (UI:R); heap write yields no confidentiality impact but high integrity and availability impact.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
4DescriptionCVE.org
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.
AnalysisAI
Heap out-of-bounds write in OpenEXR's exrmultiview utility allows an attacker who can supply crafted EXR files to corrupt heap memory when the tool combines two individually valid scanline EXR files whose union dataWindow is misaligned to one view's channel subsampling. Affected are OpenEXR versions across three maintained branches (pre-3.2.11, 3.3.0-3.3.12, and 3.4.0-3.4.13), all fixed in their respective patch releases. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that a user or automated process invoke the exrmultiview utility on two attacker-supplied EXR files where at least one file contains channels with xSampling or ySampling values other than 1, and the resulting union dataWindow is misaligned to that subsampling. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.1 (AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H) accurately reflects the attack surface: local execution with required user interaction, no confidentiality impact, but high integrity and availability impact from heap corruption. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to OpenEXR 3.2.11, 3.3.13, or 3.4.14 according to your installed branch; these are the vendor-confirmed fixed releases per the GitHub Security Advisory at https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-gjf7-wjjw-xq56, with corresponding fixes in commits 77ee19c021398b1c56f32c3af8347e365dbd4f33, c644ac2dfeac82939c81a8551d6f4b7859f63add, and e2300a3d54a93d20a36a86b82f3a506c4c91476f. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all production and development systems running OpenEXR utilities, particularly exrmultiview, and document current installed versions across your VFX pipeline infrastructure. …
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makeMultiView.cpp in exrmultiview in OpenEXR 2.3.0 has an out-of-bounds write, leading to an assertion failure or possib
Out-of-bounds heap write in OpenEXR's CompositeDeepScanLine::readPixels lets a crafted multi-part deep-scanline EXR file
In OpenEXR 2.2.0, a crafted image causes a heap-based buffer over-read in the hufDecode function in IlmImf/ImfHuf.cpp du
OpenEXR versions 3.3.0-3.3.6 and 3.4.0-3.4.4 are vulnerable to a heap buffer overflow in file parsing due to improper in
There's a flaw in OpenEXR's ImfDeepScanLineInputFile functionality in versions prior to 3.0.5. Rated medium severity (CV
A head-based buffer overflow exists in Academy Software Foundation OpenEXR 2.3.0 in writeTileData in ImfTiledOutputFile.
A Null Pointer Deference issue exists in Academy Software Foundation OpenEXR 2.3.0 in generatePreview in makePreview.cpp
A heap-based buffer overflow vulnerability exists in Academy Software Foundation OpenEXR 2.3.0 in chunkOffsetReconstruct
An issue was discovered in OpenEXR before 2.4.1. Rated medium severity (CVSS 5.5), this vulnerability is no authenticati
An issue was discovered in OpenEXR before 2.4.1. Rated medium severity (CVSS 5.5), this vulnerability is no authenticati
An issue was discovered in OpenEXR before 2.4.1. Rated medium severity (CVSS 5.5), this vulnerability is no authenticati
An issue was discovered in OpenEXR before 2.4.1. Rated medium severity (CVSS 5.5), this vulnerability is no authenticati
Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Heap Overflow
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External POC / Exploit Code
Leaving vuln.today