High severity · published Nov 10, 2025
CVE-2025-64181
OpenEXR Makes Use of Uninitialized Memory
7.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
openexr · AcademySoftwareFoundation
>= 3.3.0, < 3.3.6; >= 3.4.0, < 3.4.3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-64181
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-64181
Exploit
https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-3h9h-qfvw-98hq
Broken Link
https://github.com/user-attachments/files/23024726/archive0.zip
Broken Link
https://github.com/user-attachments/files/23024736/archive1.zip
Broken Link
https://github.com/user-attachments/files/23024740/archive2.zip
Broken Link
https://github.com/user-attachments/files/23024744/archive3.zip
Broken Link
https://github.com/user-attachments/files/23024746/archive4.zip
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