CVE-2026-68515
Received Received - Intake

Heap Out-of-Bounds Write in OpenEXR exrmultiview

Publication date: 2026-08-25

Last updated on: 2026-08-25

Assigner: GitHub, Inc.

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.

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Meta Information

Published
2026-08-25
Last Modified
2026-08-25
Generated
2026-08-26
AI Q&A
2026-08-25
EPSS Evaluated
N/A
NVD
CVE-2026-68515
EUVD
EUVD-2026-65744

Affected Vendors & Products

Showing 9 associated CPEs
Vendor Product Version / Range
academysoftwarefoundation openexr 2.*
academysoftwarefoundation openexr 3.0.*
academysoftwarefoundation openexr 3.1.*
academysoftwarefoundation openexr From 3.2.0 (inc) to 3.2.11 (exc)
academysoftwarefoundation openexr From 3.3.0 (inc) to 3.3.13 (exc)
academysoftwarefoundation openexr From 3.4.0 (inc) to 3.4.14 (exc)
academysoftwarefoundation openexr 3.2.11
academysoftwarefoundation openexr 3.3.13
academysoftwarefoundation openexr 3.4.14

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-122 A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.

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Executive Summary

This vulnerability affects OpenEXR, a format used in the motion picture industry. It allows an attacker to write past a heap allocation by combining two valid scanline EXR files with a misaligned dataWindow. The utility exrmultiview processes these files and creates a heap out-of-bounds write due to incorrect channel storage allocation.

Detection Guidance

This vulnerability can be detected by checking the version of OpenEXR installed on your system. If you are using versions before 3.2.11, 3.3.0 through 3.3.12, or 3.4.0 through 3.4.13, your system is vulnerable. Run 'exrmultiview --version' to check the installed version.

Impact Analysis

This vulnerability could allow an attacker to execute arbitrary code or cause a denial of service by exploiting the heap out-of-bounds write. It may lead to crashes, data corruption, or unauthorized system access if exploited.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR or HIPAA as it is a technical memory corruption issue in the OpenEXR library's exrmultiview tool. However, if exploited, it could lead to crashes or memory corruption in systems processing untrusted EXR files, potentially disrupting data integrity or availability in environments subject to these regulations.

Mitigation Strategies

Immediately upgrade OpenEXR to version 3.2.11, 3.3.13, or 3.4.14 or later. Avoid processing untrusted EXR files with exrmultiview until the update is applied. Monitor for any unusual system behavior that may indicate exploitation.

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