CVE-2026-34589
MEDIUMCVSS v3.1: 5.0 · EPSS: 0.0029 (20.4 percentile)
Source data as of:
At a glance
- Severity
- MEDIUM
- CVSS
- 5.0 v3.1 · NVD
- EPSS
- 0.0029 (20.4 percentile) · FIRST.org
- CISA KEV
- No
- Type
- Integer Overflow, Out-of-bounds Write · NVD CWE
- Attack conditions (CVSS vector)
- · Source: NVD Vector
- Affected vendors
- openexr
- Published
- 2026-04-06 · Modified: 2026-06-30
- References
- Jump to references (7)
CVSS / EPSS / KEV
Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources
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.
References
Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.
- Patch https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7
- Patch https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9
- Patch https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9
- Vendor advisory https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-p8xc-w3q4-h6…
- Distro https://access.redhat.com/security/cve/CVE-2026-34589
- Distro https://bugzilla.redhat.com/show_bug.cgi?id=2455411
- Distro https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34589.json