Integer Overflow or Wraparound Affecting openexr package, versions <3.3.11-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.42% (34th percentile)

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  • Snyk IDSNYK-ALPINE322-OPENEXR-17431900
  • published24 Jun 2026
  • disclosed6 Apr 2026

Introduced: 6 Apr 2026

CVE-2026-34589  (opens in a new tab)
CWE-190  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Alpine:3.22 openexr to version 3.3.11-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openexr package and not the openexr package as distributed by Alpine. See How to fix? for Alpine:3.22 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 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, the DWA lossy decoder constructs temporary per-component block pointers using signed 32-bit arithmetic. For a large enough width, the calculation overflows and later decoder stores operate on a wrapped pointer outside the allocated rowBlock backing store. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.

CVSS Base Scores

version 3.1