{"id":"CVE-2026-106547","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-106547","generatedAt":"2026-10-28T03:59:12.693Z","title":"A heap-based buffer overflow in H5VM_array_fill() in src/H5VM.c in HDF5 before 2.2.0 lets a remote attacker cause an application crash and possibly execute arbitrary code with a crafted HDF5 file.","description":"A heap-based buffer overflow in H5VM_array_fill() in src/H5VM.c in HDF5 before 2.2.0 lets a remote attacker cause an application crash and possibly execute arbitrary code with a crafted HDF5 file. When a dataset's unallocated chunks are read, H5D__fill_init() fills the fill-value buffer from datatype and dataspace metadata in the file. If that metadata is inconsistent with the buffer's allocated size, the write goes past the end of the buffer. The attacker can control the content written through the fill value stored in the file.","published":"2026-10-06T21:17:19.000Z","lastModified":"2026-10-07T16:17:40.000Z","status":"Awaiting Analysis","sourceIdentifier":"0253b833-3e77-4dfe-9d57-17db1a2f0a74","cvss":{"version":"4.0","score":8.5,"severity":"HIGH","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-122"],"affected":[],"epss":{"score":0.00163,"percentile":0.05399,"date":"2026-10-27","history":[{"date":"2026-10-07","score":0.00163,"percentile":0.04974}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.16%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-06T21:17:19.000Z","detail":{"score":"8.5","severity":"HIGH","publishedAt":"2026-10-06T21:17:18.670Z"},"summary":"New CVE, high severity (CVSS 8.5)."}],"references":[{"url":"https://github.com/HDFGroup/hdf5/pull/6529","source":"0253b833-3e77-4dfe-9d57-17db1a2f0a74"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-106547","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}