CVE-2026-59183
Received Received - Intake

Integer Overflow in OpenEXR Leading to Memory Corruption

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 3.1.0 through 3.2.10, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13, an int32_t multiplication in OpenEXRCore's unpack_sample_table() can overflow while decoding a crafted deep tiled EXR file, producing an invalid pointer that leads to a read from an unmapped memory address and a crash. Because the overflow occurs in the standard decoding path (exr_decoding_run), any application that decodes deep tiled EXR files is affected. 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
2026-08-25
AI Q&A
2026-08-25
EPSS Evaluated
N/A
NVD
CVE-2026-59183
EUVD
EUVD-2026-65190

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
academysoftwarefoundation openexr From 3.1.0 (inc) to 3.2.10 (inc)
academysoftwarefoundation openexr From 3.3.0 (inc) to 3.3.12 (inc)
academysoftwarefoundation openexr From 3.4.0 (inc) to 3.4.13 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-190 The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

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Executive Summary

This vulnerability is a signed integer overflow in OpenEXR's Core C library during decoding of crafted deep tiled EXR files. It occurs in the unpack_sample_table() function where 32-bit integer arithmetic overflows when tile dimensions exceed INT32_MAX, causing invalid pointer computation and an out-of-bounds memory read that crashes the application.

Detection Guidance
  • Check OpenEXR version with: exrheader --version or pkg-config --modversion OpenEXRCore
  • Use AddressSanitizer (ASAN) or UndefinedBehaviorSanitizer (UBSan) during compilation to detect overflows
  • Monitor for crashes when processing deep tiled EXR files with large tile dimensions
  • Inspect logs for segmentation faults during EXR file decoding
Impact Analysis

This vulnerability allows attackers to crash applications that process deep tiled EXR files by providing specially crafted files with large tile dimensions. The crash occurs during normal file decoding, potentially disrupting workflows in media and image processing applications.

Compliance Impact

This vulnerability primarily causes denial-of-service via application crashes when processing crafted deep tiled EXR files. It does not directly expose or leak sensitive data, which is a key concern for GDPR and HIPAA compliance. However, repeated crashes could disrupt systems processing image files, potentially affecting availability of services handling EXR files.

Mitigation Strategies
  • Upgrade OpenEXR to patched versions 3.2.11, 3.3.13, or 3.4.14
  • Avoid processing untrusted EXR files with large tile dimensions
  • Validate tile dimensions in EXR files before processing
  • Apply patches from GitHub commits 5e55a64, a6cf183, or e2adb5b

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