{"id":"CVE-2026-92627","state":"PUBLISHED","title":"Heap Use-After-Free in H5T__conv_f_f","description":"A heap-use-after-free vulnerability exists in H5T__conv_f_f() in src/H5Tconv.c in HDF5 before 1.14.2. When converting a compound datatype containing floating-point members during a dataset read, a temporary buffer allocated with calloc() is freed and subsequently read from within the same conversion routine. An attacker who can supply a crafted HDF5 file containing a specially constructed compound datatype can trigger the use-after-free when the file is parsed by an application that reads the affected dataset, such as h5dump. This can result in a crash and, depending on heap layout and allocator behavior, may be exploitable for further memory corruption up to remote code execution.","publishedAt":"2026-09-16T15:16:54.160Z","updatedAt":"2026-09-17T17:36:14.708Z","severity":{"score":4.6,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N","source":"HDFG"},"assigner":"HDFG","products":["The HDF Group HDF5"],"affected":[{"vendor":"The HDF Group","product":"HDF5","defaultStatus":"unaffected","versions":[{"version":"< 1.14.2","status":"affected"}],"modules":["src/H5Tconv.c"]}],"references":["https://pulsesecurity.co.nz/advisories/hdf5-memory-corruption"],"weaknesses":["CWE-416"],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/92xxx/CVE-2026-92627.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-92627","state":"PUBLISHED","datePublished":"2026-09-16T15:16:54.160Z","dateUpdated":"2026-09-17T17:36:14.708Z","assignerShortName":"HDFG","assignerOrgId":"0253b833-3e77-4dfe-9d57-17db1a2f0a74","dateReserved":"2026-09-16T15:14:38.985Z"},"containers":{"cna":{"title":"Heap Use-After-Free in H5T__conv_f_f","descriptions":[{"lang":"en","value":"A heap-use-after-free vulnerability exists in H5T__conv_f_f() in src/H5Tconv.c in HDF5 before 1.14.2. When converting a compound datatype containing floating-point members during a dataset read, a temporary buffer allocated with calloc() is freed and subsequently read from within the same conversion routine. An attacker who can supply a crafted HDF5 file containing a specially constructed compound datatype can trigger the use-after-free when the file is parsed by an application that reads the affected dataset, such as h5dump. This can result in a crash and, depending on heap layout and allocator behavior, may be exploitable for further memory corruption up to remote code execution."}],"affected":[{"vendor":"The HDF Group","product":"HDF5","defaultStatus":"unaffected","versions":[{"version":"< 1.14.2","status":"affected"}],"modules":["src/H5Tconv.c"]}],"references":[{"url":"https://pulsesecurity.co.nz/advisories/hdf5-memory-corruption"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"ACTIVE","vulnConfidentialityImpact":"LOW","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":4.6,"vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-416","lang":"en","description":"CWE-416 Use after free","type":"CWE"}]}],"providerMetadata":{"shortName":"HDFG","orgId":"0253b833-3e77-4dfe-9d57-17db1a2f0a74","dateUpdated":"2026-09-16T15:58:14.633Z"},"credits":[{"lang":"en","value":"Denis Andzakovic","type":"reporter"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.5"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-17T17:36:04.378638Z","id":"CVE-2026-92627","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-17T17:36:14.708Z"}}]}}}