{"id":"CVE-2026-17573","summary":"Double Free in H5D__chunk_copy() in HDF5 via a Crafted Chunk-Index Size Field","details":"A double free vulnerability was discovered in the HDF5 library. Processing a crafted HDF5 file containing an oversized chunk size field via h5repack may cause the application to abort due to a double free.","modified":"2026-07-28T04:02:36.584794123Z","published":"2026-07-27T15:11:54.655Z","database_specific":{"cna_assigner":"HDFG","cwe_ids":["CWE-415"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/17xxx/CVE-2026-17573.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/17xxx/CVE-2026-17573.json"},{"type":"REPORT","url":"https://github.com/HDFGroup/hdf5/issues/6124"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-17573"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/hdfgroup/hdf5","events":[{"introduced":"0"},{"last_affected":"4fde4fd787744b6a19b12032f4dad0383fbe6fbd"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"2.1.1"}],"source":"AFFECTED_FIELD"}}],"versions":["2.1.1","hdf5_2.1.0","2.1.0","2.1.0-pre1test","final_autotools_develop","snapshot","hdf5-1_13_0-rc6","hdf5-1_13_0-rc5","hdf5-1_13_0-rc4","hdf5-1_13_0-rc3","hdf5-1_13_0-rc2","hdf5-1_13_0-rc1","vms_last_support_trunk","before_removing_mpiposix_vfd","hdf5-1_9-start","hdf5-1_8_0-beta5","hdf5-1_8_0-beta4","hdf5-1_8_0-beta3","hdf5-1_8_0-beta2","hdf5-1_8_0-beta1","hdf5-1_8_0-alpha4","hdf5-1_8_0-alpha3","hdf5-1_8_0-alpha2","before_removing_fphdf5","before_removing_docs","before_removing_tbbt_code","before_signed_unsigned_changes","hdf5-1_6_2","hdf5-1_6_1","hdf5-1_6_0","hdf5-1_4_0","hdf5-1_4_1","hdf5-1_3_1","hdf5-1_3_0","hdf5-1_2_1","hdf5-1_2_0beta","hdf5-1_2_0-beta1-update2","hdf5-1_2_0","hdf5-1_0_1","hdf5-1_0_0","r1_1beta1","hdf5-1_0_0-alpha2","proto1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-17573.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U"}]}