CVE-2026-34589
Last modified
CVE-2026-34589 is a medium-severity vulnerability rated 5/10 on the CVSS scale. 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. EPSS estimates a 0.42% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Openexr | Openexr | >= 3.2.0, < 3.2.7 |
| Openexr | Openexr | >= 3.3.0, < 3.3.9 |
| Openexr | Openexr | >= 3.4.0, < 3.4.9 |
References
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7Product, Release Notes
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9Product, Release Notes
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9Product, Release Notes
- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-p8xc-w3q4-h64xExploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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