{"id":"CVE-2026-29043","aliases":["DEBIAN-CVE-2026-29043","EUVD-2026-21406","GHSA-qm2m-5g5w-2277","JLSEC-2026-353","UBUNTU-CVE-2026-29043"],"status":"published","title":"HDF5 H5T__ref_mem_setnull Heap Buffer Overflow","description":"HDF5 is software for managing data. In 1.14.1-2 and earlier, an attacker who can control an h5 file parsed by HDF5 can trigger a write-based heap buffer overflow condition in the H5T__ref_mem_setnull method. This can lead to a denial-of-service condition, and potentially further issues such as remote code execution depending on the practical exploitability of the heap overflow against modern operating systems.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00221,"percentile":0.12775,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-122"],"published":"2026-04-10T15:35:51Z","modified":"2026-10-28T02:30:42Z","fixes":[{"ecosystem":"Julia","package":"HDF5_jll","fixed_in":["1.14.1+0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"hdf5","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"]},{"source":"osv","ecosystem":"Debian:13","package":"hdf5","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"]},{"source":"osv","ecosystem":"Debian:14","package":"hdf5","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"]},{"source":"osv","ecosystem":"Julia","package":"HDF5_jll","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.14.1+0"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"hdf5","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.11-3ubuntu1","1.8.11-5ubuntu1","1.8.11-5ubuntu2","1.8.11-5ubuntu6","1.8.11-5ubuntu7","1.8.11-5ubuntu7.1","1.8.11-5ubuntu7.1+esm1","1.8.11-5ubuntu7.1+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"hdf5","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.15-patch1+docs-4","1.8.15-patch1+docs-5","1.8.16+docs-1","1.8.16+docs-2","1.8.16+docs-3","1.8.16+docs-3ubuntu1","1.8.16+docs-4","1.8.16+docs-4ubuntu1","1.8.16+docs-4ubuntu1.1","1.8.16+docs-4ubuntu1.1+esm1","1.8.16+docs-4ubuntu1.1+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"hdf5","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.0-patch1+docs-4","1.10.0-patch1+docs-4ubuntu0.1~esm1","1.10.0-patch1+docs-4ubuntu0.1~esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"hdf5","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.4+repack-10","1.10.4+repack-11","1.10.4+repack-11ubuntu1","1.10.4+repack-11ubuntu1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"hdf5","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.6+repack-5","1.10.7+repack-4ubuntu1","1.10.7+repack-4ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"hdf5","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.8+repack1-1ubuntu1","1.10.10+repack-3ubuntu1","1.10.10+repack-3.1ubuntu3","1.10.10+repack-3.1ubuntu4"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"hdf5","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.14.5+repack-3","1.14.5+repack-3build1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"hdf5","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.14.6+repack-2","2.2.0+repack-4","2.2.0+repack-5"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"hdf5","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.14.5+repack-3build1","1.14.5+repack-4","1.14.6+repack-2"]}],"products":[{"vendor":"hdfgroup","product":"hdf5"}],"references":[{"url":"https://github.com/HDFGroup/hdf5/security/advisories/GHSA-qm2m-5g5w-2277","tags":["x_refsource_CONFIRM","Exploit","Vendor Advisory","advisory","web","report"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29043.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-29043","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-29043","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-29043","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-29043","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-29043","title":"HDF5 H5T__ref_mem_setnull Heap Buffer Overflow","description":"HDF5 is software for managing data. In 1.14.1-2 and earlier, an attacker who can control an h5 file parsed by HDF5 can trigger a write-based heap buffer overflow condition in the H5T__ref_mem_setnull method. This can lead to a denial-of-service condition, and potentially further issues such as remote code execution depending on the practical exploitability of the heap overflow against modern operating systems.","status":"published","published":"2026-04-10T15:35:51.682Z","modified":"2026-04-14T14:50:46.566Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:19:56.284359Z"}],"euvd":[{"id":"EUVD-2026-21406","description":"HDF5 is software for managing data. In 1.14.1-2 and earlier, an attacker who can control an h5 file parsed by HDF5 can trigger a write-based heap buffer overflow condition in the H5T__ref_mem_setnull method. This can lead to a denial-of-service condition, and potentially further issues such as remote code execution depending on the practical exploitability of the heap overflow against modern operating systems.","status":"published","published":"2026-04-10T15:35:51Z","modified":"2026-04-14T14:50:46Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T19:24:25.999353Z"}],"nvd":[{"id":"CVE-2026-29043","description":"HDF5 is software for managing data. In 1.14.1-2 and earlier, an attacker who can control an h5 file parsed by HDF5 can trigger a write-based heap buffer overflow condition in the H5T__ref_mem_setnull method. This can lead to a denial-of-service condition, and potentially further issues such as remote code execution depending on the practical exploitability of the heap overflow against modern operating systems.","status":"published","published":"2026-04-10T16:16:30.693Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:12:13.902911Z"}],"osv":[{"id":"CVE-2026-29043","title":"HDF5 H5T__ref_mem_setnull Heap Buffer Overflow","description":"HDF5 is software for managing data. In 1.14.1-2 and earlier, an attacker who can control an h5 file parsed by HDF5 can trigger a write-based heap buffer overflow condition in the H5T__ref_mem_setnull method. This can lead to a denial-of-service condition, and potentially further issues such as remote code execution depending on the practical exploitability of the heap overflow against modern operating systems.","status":"published","published":"2026-04-10T15:35:51.682Z","modified":"2026-10-28T02:30:42.435318593Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:45:00.530889Z"},{"id":"DEBIAN-CVE-2026-29043","description":"HDF5 is software for managing data. In 1.14.1-2 and earlier, an attacker who can control an h5 file parsed by HDF5 can trigger a write-based heap buffer overflow condition in the H5T__ref_mem_setnull method. This can lead to a denial-of-service condition, and potentially further issues such as remote code execution depending on the practical exploitability of the heap overflow against modern operating systems.","status":"published","published":"2026-04-10T16:16:30.693Z","modified":"2026-10-27T09:47:38.98445733Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:53.877573Z"},{"id":"JLSEC-2026-353","description":"HDF5 is software for managing data. In 1.14.1-2 and earlier, an attacker who can control an h5 file parsed by HDF5 can trigger a write-based heap buffer overflow condition in the `H5T__ref_mem_setnull` method. This can lead to a denial-of-service condition, and potentially further issues such as remote code execution depending on the practical exploitability of the heap overflow against modern operating systems.","status":"published","published":"2026-04-29T13:21:01.555Z","modified":"2026-07-25T18:24:20.415785061Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:47:18.573531Z"},{"id":"UBUNTU-CVE-2026-29043","description":"HDF5 is software for managing data. In 1.14.1-2 and earlier, an attacker who can control an h5 file parsed by HDF5 can trigger a write-based heap buffer overflow condition in the H5T__ref_mem_setnull method. This can lead to a denial-of-service condition, and potentially further issues such as remote code execution depending on the practical exploitability of the heap overflow against modern operating systems.","status":"published","published":"2026-04-10T16:16:00Z","modified":"2026-10-17T12:59:57.485978209Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:56:11.640778Z"}]}}