Home/CVE/OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the
CVE

CVE-2025-64181

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the

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.

HIGH · CVSS 7.5 EPSS 0.00114
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-457Use of Uninitialized Variable
▤

Affected Products & Versions

2
openexr>= 3.3.0 and < 3.3.6
openexr>= 3.4.0 and < 3.4.3
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
PyPI openexr LOW fixed in 3.3.6
⚠

Public Exploits & PoCs

1
pocgithub.com · GHSA-3h9h-qfvw-98hqgithub.com
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD10 Nov 2025 · 10:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

3
suse-csafopenSUSE-SU-2025:20056-1
suse-csafSUSE-SU-2025:21014-1
suse-csafopenSUSE-SU-2025:15741-1
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/user-attachments/files/23024726/archive0.zipBroken Link
https://github.com/user-attachments/files/23024736/archive1.zipBroken Link
https://github.com/user-attachments/files/23024740/archive2.zipBroken Link
https://github.com/user-attachments/files/23024744/archive3.zipBroken Link
https://github.com/user-attachments/files/23024746/archive4.zipBroken Link
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