CVE-2025-64181

Name: CVE-2025-64181
Creator: NVD / NIST
Published: 2025-11-10T22:15:36.933+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2/10EPSS 0.33%

Last modified Jun 17, 2026

CVE-2025-64181 is a low-severity vulnerability rated 2/10 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. 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`. EPSS estimates a 0.33% 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. 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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS 4.0

2/10

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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

EPSS Probability

0.33%

24.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-457

Affected Software

Vendor	Product	Versions
Openexr	Openexr	>= 3.3.0, < 3.3.6
Openexr	Openexr	>= 3.4.0, < 3.4.3

References

https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-3h9h-qfvw-98hqExploit, Vendor Advisory
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
https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-3h9h-qfvw-98hqExploit, Vendor Advisory

Timeline

Published: Nov 10, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-64181?

How severe is CVE-2025-64181?

CVE-2025-64181 has a CVSS score of 2/10 (LOW severity). The EPSS model estimates a 0.33% probability of exploitation in the next 30 days.

How do I fix CVE-2025-64181?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-64181?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST