{"id":"DEBIAN-CVE-2026-19028","details":"H5Z__filter_fletcher32 in H5Zfletcher32.c in HDF5 through 2.3.0 computes the data length to checksum by subtracting the 4-byte trailing checksum size from the input buffer size without checking that the buffer is at least 4 bytes, allowing a size_t underflow. This allows attackers to cause a denial of service (massively out-of-bounds read and application crash in H5_checksum_fletcher32) via a crafted HDF5 file with a Fletcher32-filtered chunk smaller than 4 bytes, triggered via H5Dread, e.g. by the h5ls or h5dump tools.","modified":"2026-09-14T17:03:20.007838002Z","published":"2026-08-06T00:16:53.427Z","upstream":["CVE-2026-19028"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-19028"}],"affected":[{"package":{"name":"hdf5","ecosystem":"Debian:12","purl":"pkg:deb/debian/hdf5?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.10+repack-1","1.10.10+repack-2","1.10.10+repack-3","1.10.10+repack-3.1","1.10.10+repack-3.2","1.10.10+repack-3.2+ports","1.10.10+repack-3.3","1.10.10+repack-4","1.10.10+repack-5","1.10.8+repack1-1","1.12.0+repack-1~exp1","1.12.0+repack-1~exp2","1.12.2+repack-1~exp1","1.14.3+repack-1~exp1","1.14.3+repack1-1~exp2","1.14.3+repack1-1~exp3","1.14.4.3+repack-1~exp1","1.14.4.3+repack-1~exp2","1.14.4.3+repack-1~exp3","1.14.5+repack-1","1.14.5+repack-1~exp1","1.14.5+repack-1~exp2","1.14.5+repack-1~exp3","1.14.5+repack-1~exp4","1.14.5+repack-1~exp5","1.14.5+repack-1~exp6","1.14.5+repack-2","1.14.5+repack-3","1.14.5+repack-3.1","1.14.5+repack-3~exp1","1.14.5+repack-3~exp2","1.14.5+repack-3~exp3","1.14.5+repack-3~exp4","1.14.5+repack-4","1.14.5+repack-4~exp1","1.14.5+repack-4~exp2","1.14.5+repack-5~exp2","1.14.5+repack-5~exp3","1.14.6+repack-1","1.14.6+repack-1~exp1","1.14.6+repack-1~exp10","1.14.6+repack-1~exp11","1.14.6+repack-1~exp12","1.14.6+repack-1~exp13","1.14.6+repack-1~exp14","1.14.6+repack-1~exp15","1.14.6+repack-1~exp16","1.14.6+repack-1~exp17","1.14.6+repack-1~exp18","1.14.6+repack-1~exp19","1.14.6+repack-1~exp2","1.14.6+repack-1~exp20","1.14.6+repack-1~exp21","1.14.6+repack-1~exp3","1.14.6+repack-1~exp4","1.14.6+repack-1~exp5","1.14.6+repack-1~exp6","1.14.6+repack-1~exp7","1.14.6+repack-1~exp8","1.14.6+repack-1~exp9","1.14.6+repack-2","1.14.6+repack-3~exp1","2.1.0+repack-1","2.1.0+repack-1~exp10","2.1.0+repack-1~exp11","2.1.0+repack-1~exp3","2.1.0+repack-1~exp4","2.1.0+repack-1~exp5","2.1.0+repack-1~exp6","2.1.0+repack-1~exp7","2.1.0+repack-1~exp8","2.1.0+repack-1~exp9","2.2.0+repack-1","2.2.0+repack-2","2.2.0+repack-3","2.2.0+repack-4","2.2.0+repack-5"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19028.json"}},{"package":{"name":"hdf5","ecosystem":"Debian:13","purl":"pkg:deb/debian/hdf5?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.14.5+repack-3","1.14.5+repack-3.1","1.14.5+repack-4","1.14.5+repack-4~exp1","1.14.5+repack-4~exp2","1.14.5+repack-5~exp2","1.14.5+repack-5~exp3","1.14.6+repack-1","1.14.6+repack-1~exp1","1.14.6+repack-1~exp10","1.14.6+repack-1~exp11","1.14.6+repack-1~exp12","1.14.6+repack-1~exp13","1.14.6+repack-1~exp14","1.14.6+repack-1~exp15","1.14.6+repack-1~exp16","1.14.6+repack-1~exp17","1.14.6+repack-1~exp18","1.14.6+repack-1~exp19","1.14.6+repack-1~exp2","1.14.6+repack-1~exp20","1.14.6+repack-1~exp21","1.14.6+repack-1~exp3","1.14.6+repack-1~exp4","1.14.6+repack-1~exp5","1.14.6+repack-1~exp6","1.14.6+repack-1~exp7","1.14.6+repack-1~exp8","1.14.6+repack-1~exp9","1.14.6+repack-2","1.14.6+repack-3~exp1","2.1.0+repack-1","2.1.0+repack-1~exp10","2.1.0+repack-1~exp11","2.1.0+repack-1~exp3","2.1.0+repack-1~exp4","2.1.0+repack-1~exp5","2.1.0+repack-1~exp6","2.1.0+repack-1~exp7","2.1.0+repack-1~exp8","2.1.0+repack-1~exp9","2.2.0+repack-1","2.2.0+repack-2","2.2.0+repack-3","2.2.0+repack-4","2.2.0+repack-5"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19028.json"}},{"package":{"name":"hdf5","ecosystem":"Debian:14","purl":"pkg:deb/debian/hdf5?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.14.5+repack-3","1.14.5+repack-3.1","1.14.5+repack-4","1.14.5+repack-4~exp1","1.14.5+repack-4~exp2","1.14.5+repack-5~exp2","1.14.5+repack-5~exp3","1.14.6+repack-1","1.14.6+repack-1~exp1","1.14.6+repack-1~exp10","1.14.6+repack-1~exp11","1.14.6+repack-1~exp12","1.14.6+repack-1~exp13","1.14.6+repack-1~exp14","1.14.6+repack-1~exp15","1.14.6+repack-1~exp16","1.14.6+repack-1~exp17","1.14.6+repack-1~exp18","1.14.6+repack-1~exp19","1.14.6+repack-1~exp2","1.14.6+repack-1~exp20","1.14.6+repack-1~exp21","1.14.6+repack-1~exp3","1.14.6+repack-1~exp4","1.14.6+repack-1~exp5","1.14.6+repack-1~exp6","1.14.6+repack-1~exp7","1.14.6+repack-1~exp8","1.14.6+repack-1~exp9","1.14.6+repack-2","1.14.6+repack-3~exp1","2.1.0+repack-1","2.1.0+repack-1~exp10","2.1.0+repack-1~exp11","2.1.0+repack-1~exp3","2.1.0+repack-1~exp4","2.1.0+repack-1~exp5","2.1.0+repack-1~exp6","2.1.0+repack-1~exp7","2.1.0+repack-1~exp8","2.1.0+repack-1~exp9","2.2.0+repack-1","2.2.0+repack-2","2.2.0+repack-3","2.2.0+repack-4","2.2.0+repack-5"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19028.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:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}