{"id":"CVE-2026-86095","summary":"Unidata netcdf-c through 4.10.1 Out-of-bounds Write via Oversized HDF5 Attribute Name","details":"Unidata netcdf-c through 4.10.1 contains an out-of-bounds write vulnerability in NC4_HDF5_inq_attname() that copies HDF5 attribute names into a fixed 256-byte buffer without length validation. Attackers can craft HDF5 files with oversized attribute names to overflow the destination buffer, causing memory corruption and crashes when applications enumerate attribute names.","modified":"2026-09-06T03:47:21.046224144Z","published":"2026-09-04T22:38:46.036Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86095.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-787"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86095.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86095"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/unidata-netcdf-c-through-4.10.1-out-of-bounds-write-via-oversized-hdf5-attribute-name"},{"type":"PACKAGE","url":"https://github.com/Unidata/netcdf-c"},{"type":"ARTICLE","url":"https://github.com/Unidata/netcdf-c/blob/v4.10.1/libhdf5/hdf5attr.c"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/unidata/netcdf-c","events":[{"introduced":"0"},{"fixed":"ad3d53827ab4c70f65a63eae7aad660da58e6cb5"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"4.10.1"},{"fixed":"4.10.1"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["pre-nczarr-merge","cdf-5-merge-checkpoint"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86095.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}