OpenEXR: DWA Lossy Decoder Heap Out-of-Bounds Write (AcademySoftwareFoundation openexr)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.42 % · percentile 36 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Modified
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.
Weaknesses (CWE)
References
- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-p8xc-w3q4-h64x
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9
- 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
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 4.0 | HIGH 8.4 | 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 | GitHub_M |
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | redhat-SADP |
| CVSS 4.0 | HIGH 8.4 | 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 | NVD · security-advisories@github.com (Secondary) |
| CVSS 3.1 | MEDIUM 5.0 | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
Advisories
- GHSA-p8xc-w3q4-h64x — OpenEXR: DWA Lossy Decoder Heap Out-of-Bounds Write
- PYSEC-2026-2848 — OpenEXR: DWA Lossy Decoder Heap Out-of-Bounds Write
European references
- ENISA EUVD · EUVD-2026-19348
- GCVE · GCVE-0-2026-34589
Affected configurations (NVD CPE)
cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*≥ 3.2.0 < 3.2.7cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*≥ 3.3.0 < 3.3.9cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*≥ 3.4.0 < 3.4.9
Affected products
| Product | Versions |
|---|---|
| AcademySoftwareFoundation · openexr | affected >= 3.2.0, < 3.2.7 ; affected >= 3.3.0, < 3.3.9 ; affected >= 3.4.0, < 3.4.9 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |