{"id":"JLSEC-2026-345","details":"A vulnerability, which was classified as problematic, was found in HDF5 1.14.6. Affected is the function `H5O__chunk_protect` of the file `/src/H5Ochunk.c`. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed to the public and may be used.","modified":"2026-07-25T18:24:19.507384284Z","published":"2026-04-29T13:21:01.555Z","upstream":["CVE-2025-6818"],"database_specific":{"license":"CC-BY-4.0","sources":[{"published":"2025-06-28T16:15:23.977Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2025-6818","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2025-6818","database_specific":{"status":"Analyzed"},"id":"CVE-2025-6818","imported":"2026-07-17T21:41:17.421Z","modified":"2026-06-17T10:02:37.293Z"}]},"references":[{"type":"WEB","url":"https://github.com/HDFGroup/hdf5/issues/5573"},{"type":"WEB","url":"https://github.com/user-attachments/files/20623382/hdf5_crash_5.txt"},{"type":"WEB","url":"https://vuldb.com/?ctiid.314256"},{"type":"WEB","url":"https://vuldb.com/?id.314256"},{"type":"WEB","url":"https://vuldb.com/?submit.602326"}],"affected":[{"package":{"name":"HDF5_jll","ecosystem":"Julia","purl":"pkg:julia/HDF5_jll?uuid=0234f1f7-429e-5d53-9886-15a909be8d59"},"ranges":[{"type":"SEMVER","events":[{"introduced":"1.14.5+0"},{"fixed":"2.0.0+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-345.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V2","score":"AV:L/AC:L/Au:S/C:N/I:N/A:P"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"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/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"}]}