CVE-2026-34589

Summary

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.

Affected Software

VendorProductVersion RangeStatus
AcademySoftwareFoundationopenexr>= 3.2.0, < 3.2.7affected
AcademySoftwareFoundationopenexr>= 3.3.0, < 3.3.9affected
AcademySoftwareFoundationopenexr>= 3.4.0, < 3.4.9affected

Weaknesses

  • CWE-190: CWE-190: Integer Overflow or Wraparound
  • CWE-787: CWE-787: Out-of-bounds Write

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

OpenEXR: OpenEXR: Memory corruption leading to arbitrary code execution or denial of service

Additional References

References