{"id":"CVE-2026-19026","revision":"aa9159c5c447492a8f3d78fff2ecf51e","records":[{"revision":"aa9159c5c447492a8f3d78fff2ecf51e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-19026","aliases":[],"title":"Nbit filter NULL/short parameter-array dereference","description":"H5Z__filter_nbit in H5Znbit.c in HDF5 prior to 2.3.0 dereferences cd_values[0] through cd_values[4] without validating that cd_values is non-NULL or that cd_nelmts is at least 5, the fixed size of the filter's header. This allows attackers to cause a denial of service via a crafted HDF5 file that stores the N-Bit filter pipeline message with zero client-data values, opened and read via H5Dread, e.g. by the h5ls or h5repack tools.","state":0,"publishedAt":"2026-08-05T22:47:58.227+00:00","modifiedAt":"2026-10-06T20:32:13.006+00:00","affected":[{"ecosystem":"Vendor product","name":"HDF5","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"The HDF Group\",\n                    \"product\": \"HDF5\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"<=2.3.0\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":6.8,"severity":"MEDIUM"}],"references":["https://github.com/HDFGroup/hdf5/pull/6497","https://github.com/HDFGroup/hdf5/issues/6489","https://github.com/HDFGroup/hdf5/issues/6492"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-19026","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-19026","identifiers":["CVE-2026-19026"]},"retained":false,"historicalAffected":[]}],"coverage":[]}