CVE-2026-34589

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 v3 5.0 MEDIUM

5.0^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.3 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7	Product Release Notes
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9	Product Release Notes
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9	Product Release Notes
https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-p8xc-w3q4-h64x	Exploit Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-34589
https://bugzilla.redhat.com/show_bug.cgi?id=2455411
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34589.json

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:openexr:openexr::::::::
	cpe:2.3:a:openexr:openexr::::::::
	cpe:2.3:a:openexr:openexr::::::::

History

No history.

Information

Published : 2026-04-06 16:16

Updated : 2026-07-15 02:20

NVD link : CVE-2026-34589

Mitre link : CVE-2026-34589

CVE.ORG link : CVE-2026-34589

JSON object : View

Products Affected

openexr

openexr

CWE

CWE-190

Integer Overflow or Wraparound

CWE-787

Out-of-bounds Write

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