Description
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.3.0 through 3.3.5 and 3.4.0 through 3.4.2, while fuzzing `openexr_exrcheck_fuzzer`, Valgrind reports a conditional branch depending on uninitialized data inside `generic_unpack`. This indicates a use of uninitialized memory. The issue can result in undefined behavior and/or a potential crash/denial of service. Versions 3.3.6 and 3.4.3 fix the issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| AcademySoftwareFoundation | openexr | >= 3.3.0, < 3.3.6, >= 3.4.0, < 3.4.3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | openexr | 3.4.6+ds-1 | — |
| Debian 13 | openexr | No fix yet | — |
| Debian 12 | openexr | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | openexr | 3.2.2-160000.3.1 | SUSE-SU-2025:21014-1 |
| SLES 16.0 | openexr | 3.2.2-160000.3.1 | SUSE-SU-2025:21014-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openexr | 3.4.3-1.1 | openSUSE-SU-2025:15741-1 |
| openSUSE Leap 16.0 | openexr | 3.2.2-160000.3.1 | openSUSE-SU-2025:20056-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | openexr | >= 3.3.0, < 3.3.6 | 3.3.6 | GHSA-3h9h-qfvw-98hq |
| PyPI | openexr | >= 3.4.0, < 3.4.3 | 3.4.3 | GHSA-3h9h-qfvw-98hq |
| PyPI | openexr | >= 3.3.0, < 3.3.6 · >= 3.4.0, < 3.4.3 | 3.3.6, 3.4.3 | PYSEC-2026-2843 |
Advisories 3
- openSUSE-SU-2025:20056-1 Security update for openexr SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15741-1 libIex-3_4-33-3.4.3-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21014-1 Security update for openexr SUSE / openSUSE Security Updates · Mar 23, 2026
References
- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-3h9h-qfvw-98hq
- https://github.com/user-attachments/files/23024726/archive0.zip
- https://github.com/user-attachments/files/23024736/archive1.zip
- https://github.com/user-attachments/files/23024740/archive2.zip
- https://github.com/user-attachments/files/23024744/archive3.zip
- https://github.com/user-attachments/files/23024746/archive4.zip