{"cve":"CVE-2025-64181","nvd":{"published":"2025-11-10T22:15:36.933","modified":"2026-06-17T09:53:58.160","status":"Analyzed","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_v4":{"vector":"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","score":2.0},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-457"],"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"],"products":["openexr:openexr"],"source":"nvd","synced_at":"2026-10-19T22:14:53.307938015+00:00"},"epss":{"cve":"CVE-2025-64181","score":0.00409,"percentile":0.3523,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-3h9h-qfvw-98hq","url":"https://osv.dev/vulnerability/GHSA-3h9h-qfvw-98hq","summary":"OpenEXR Makes Use of Uninitialized Memory","modified":"2026-07-13T16:43:02.056352689Z","packages":[{"ecosystem":"PyPI","name":"openexr","purl":"pkg:pypi/openexr","ranges":[">=3.3.0 <3.3.6"],"fixed":["3.3.6"]},{"ecosystem":"PyPI","name":"openexr","purl":"pkg:pypi/openexr","ranges":[">=3.4.0 <3.4.3"],"fixed":["3.4.3"]}]},{"id":"PYSEC-2026-2843","url":"https://osv.dev/vulnerability/PYSEC-2026-2843","summary":"OpenEXR Makes Use of Uninitialized Memory","modified":"2026-07-13T16:32:32.950394461Z","packages":[{"ecosystem":"PyPI","name":"openexr","purl":"pkg:pypi/openexr","ranges":[">=3.3.0 <3.3.6",">=3.4.0 <3.4.3"],"fixed":["3.3.6","3.4.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}