Integer Overflow or Wraparound Affecting openexr-debuginfo package, versions <0:3.1.5-1.amzn2023.0.9


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.05% (17th percentile)

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  • Snyk IDSNYK-AMZN2023-OPENEXRDEBUGINFO-16350563
  • published3 May 2026
  • disclosed6 Apr 2026

Introduced: 6 Apr 2026

CVE-2026-34378  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 openexr-debuginfo to version 0:3.1.5-1.amzn2023.0.9 or higher.
This issue was patched in ALAS2023-2026-1612.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openexr-debuginfo package and not the openexr-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in generic_unpack(). By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9.

CVSS Base Scores

version 3.1