{"id":"CVE-2025-6856","summary":"HDF5 H5FL.c H5FL__reg_gc_list use after free","details":"A vulnerability, which was classified as problematic, was found in HDF5 1.14.6. Affected is the function H5FL__reg_gc_list of the file src/H5FL.c. The manipulation leads to use after free. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used.","modified":"2026-08-12T03:30:26.115360397Z","published":"2025-06-29T09:31:05.927Z","database_specific":{"cna_assigner":"VulDB","cwe_ids":["CWE-119","CWE-416"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/6xxx/CVE-2025-6856.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/6xxx/CVE-2025-6856.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-6856"},{"type":"ADVISORY","url":"https://vuldb.com/?id.314328"},{"type":"ADVISORY","url":"https://vuldb.com/?submit.602528"},{"type":"REPORT","url":"https://github.com/HDFGroup/hdf5/issues/5574"},{"type":"REPORT","url":"https://vuldb.com/?ctiid.314328"},{"type":"EVIDENCE","url":"https://github.com/user-attachments/files/20623417/hdf5_crash_6.txt"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/hdfgroup/hdf5","events":[{"introduced":"7bf340440909d468dbb3cf41f0ea0d87f5050cea"},{"last_affected":"7bf340440909d468dbb3cf41f0ea0d87f5050cea"}],"database_specific":{"cpe":"cpe:2.3:a:hdfgroup:hdf5:1.14.6:*:*:*:*:*:*:*","extracted_events":[{"introduced":"1.14.6"},{"last_affected":"1.14.6"}],"source":["AFFECTED_FIELD","CPE_STRING"]}}],"versions":["1.14.6","hdf5_1.14.6","hdf5-1.14.6"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-6856.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"}]}