CVE-2026-19025

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-19025", "assignerOrgId": "0253b833-3e77-4dfe-9d57-17db1a2f0a74", "state": "PUBLISHED", "assignerShortName": "HDFG", "dateReserved": "2026-08-05T22:14:38.816Z", "datePublished": "2026-08-05T22:35:11.510Z", "dateUpdated": "2026-08-06T14:34:46.492Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "0253b833-3e77-4dfe-9d57-17db1a2f0a74", "shortName": "HDFG", "dateUpdated": "2026-08-05T22:35:11.510Z"}, "title": "HDF5 divide-by-zero (SIGFPE) via mismatched chunk-layout dimensionality and dataspace rank on dataset open", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-369", "description": "CWE-369 Divide by zero", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-165", "descriptions": [{"lang": "en", "value": "CAPEC-165 File Manipulation"}]}], "affected": [{"vendor": "The HDF Group", "product": "HDF5", "versions": [{"status": "affected", "version": "<= 2.3.0"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "H5O__layout_decode in H5Olayout.c in HDF5 through 2.3.0 does not validate that a chunked dataset's stored chunk-layout dimensionality matches its dataspace rank when an existing dataset is opened, whereas this check is performed only at dataset-creation time. This allows attackers to cause a denial of service (divide-by-zero and application crash in H5S__hyper_iter_get_seq_list in src/H5Shyper.c) via a crafted HDF5 file with mismatched chunk/dataspace ranks that is opened and read via H5Dopen2 and H5Dread, e.g. by the h5repack tool.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "H5O__layout_decode in H5Olayout.c in HDF5 through 2.3.0 does not validate that a chunked dataset's stored chunk-layout dimensionality matches its dataspace rank when an existing dataset is opened, whereas this check is performed only at dataset-creation time. This allows attackers to cause a denial of service (divide-by-zero and application crash in H5S__hyper_iter_get_seq_list in src/H5Shyper.c) via a crafted HDF5 file with mismatched chunk/dataspace ranks that is opened and read via H5Dopen2 and H5Dread, e.g. by the h5repack tool.<br><br><br>"}]}], "references": [{"url": "https://github.com/HDFGroup/hdf5/issues/6491"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "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": 6.8, "vectorString": "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"}}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.4"}}, "adp": [{"references": [{"url": "https://github.com/HDFGroup/hdf5/issues/6491", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-06T14:34:22.854081Z", "id": "CVE-2026-19025", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-06T14:34:46.492Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-19025", "assignerOrgId": "0253b833-3e77-4dfe-9d57-17db1a2f0a74", "state": "PUBLISHED", "assignerShortName": "HDFG", "dateReserved": "2026-08-05T22:14:38.816Z", "datePublished": "2026-08-05T22:35:11.510Z", "dateUpdated": "2026-08-06T14:34:46.492Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "0253b833-3e77-4dfe-9d57-17db1a2f0a74", "shortName": "HDFG", "dateUpdated": "2026-08-05T22:35:11.510Z"}, "title": "HDF5 divide-by-zero (SIGFPE) via mismatched chunk-layout dimensionality and dataspace rank on dataset open", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-369", "description": "CWE-369 Divide by zero", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-165", "descriptions": [{"lang": "en", "value": "CAPEC-165 File Manipulation"}]}], "affected": [{"vendor": "The HDF Group", "product": "HDF5", "versions": [{"status": "affected", "version": "<= 2.3.0"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "H5O__layout_decode in H5Olayout.c in HDF5 through 2.3.0 does not validate that a chunked dataset's stored chunk-layout dimensionality matches its dataspace rank when an existing dataset is opened, whereas this check is performed only at dataset-creation time. This allows attackers to cause a denial of service (divide-by-zero and application crash in H5S__hyper_iter_get_seq_list in src/H5Shyper.c) via a crafted HDF5 file with mismatched chunk/dataspace ranks that is opened and read via H5Dopen2 and H5Dread, e.g. by the h5repack tool.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "H5O__layout_decode in H5Olayout.c in HDF5 through 2.3.0 does not validate that a chunked dataset's stored chunk-layout dimensionality matches its dataspace rank when an existing dataset is opened, whereas this check is performed only at dataset-creation time. This allows attackers to cause a denial of service (divide-by-zero and application crash in H5S__hyper_iter_get_seq_list in src/H5Shyper.c) via a crafted HDF5 file with mismatched chunk/dataspace ranks that is opened and read via H5Dopen2 and H5Dread, e.g. by the h5repack tool.<br><br><br>"}]}], "references": [{"url": "https://github.com/HDFGroup/hdf5/issues/6491"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "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": 6.8, "vectorString": "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"}}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.4"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-19025", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-06T14:34:22.854081Z"}}}], "references": [{"url": "https://github.com/HDFGroup/hdf5/issues/6491", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-06T14:34:36.634Z"}}]}}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "HDF5", "vendor": "The HDF Group", "versions": [{"status": "affected", "version": "<= 2.3.0"}]}], "source": "0253b833-3e77-4dfe-9d57-17db1a2f0a74"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "H5O__layout_decode in H5Olayout.c in HDF5 through 2.3.0 does not validate that a chunked dataset's stored chunk-layout dimensionality matches its dataspace rank when an existing dataset is opened, whereas this check is performed only at dataset-creation time. This allows attackers to cause a denial of service (divide-by-zero and application crash in H5S__hyper_iter_get_seq_list in src/H5Shyper.c) via a crafted HDF5 file with mismatched chunk/dataspace ranks that is opened and read via H5Dopen2 and H5Dread, e.g. by the h5repack tool."}, {"lang": "es", "value": "H5O__layout_decode en H5Olayout.c en HDF5 hasta 2.3.0 no valida que la dimensionalidad del dise\u00f1o de fragmentos almacenado de un conjunto de datos fragmentado coincida con su rango de espacio de datos cuando se abre un conjunto de datos existente, mientras que esta verificaci\u00f3n se realiza solo en el momento de la creaci\u00f3n del conjunto de datos. Esto permite a los atacantes causar una denegaci\u00f3n de servicio (divisi\u00f3n por cero y ca\u00edda de la aplicaci\u00f3n en H5S__hyper_iter_get_seq_list en src/H5Shyper.c) a trav\u00e9s de un archivo HDF5 manipulado con rangos de fragmento/espacio de datos no coincidentes que se abre y lee a trav\u00e9s de H5Dopen2 y H5Dread, por ejemplo, por la herramienta h5repack."}], "id": "CVE-2026-19025", "lastModified": "2026-10-23T21:10:00.157", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "0253b833-3e77-4dfe-9d57-17db1a2f0a74", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-19025", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-06T14:34:22.854081Z", "version": "2.0.3"}}]}, "published": "2026-08-05T23:16:53.483", "references": [{"source": "0253b833-3e77-4dfe-9d57-17db1a2f0a74", "url": "https://github.com/HDFGroup/hdf5/issues/6491"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/HDFGroup/hdf5/issues/6491"}], "sourceIdentifier": "0253b833-3e77-4dfe-9d57-17db1a2f0a74", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-369"}], "source": "0253b833-3e77-4dfe-9d57-17db1a2f0a74", "type": "Secondary"}]}

{"bugzilla": {"description": "hdf5: HDF5: Denial of Service due to malformed chunk data in files", "id": "2511850", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2511850"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-369", "details": ["H5O__layout_decode in H5Olayout.c in HDF5 through 2.3.0 does not validate that a chunked dataset's stored chunk-layout dimensionality matches its dataspace rank when an existing dataset is opened, whereas this check is performed only at dataset-creation time. This allows attackers to cause a denial of service (divide-by-zero and application crash in H5S__hyper_iter_get_seq_list in src/H5Shyper.c) via a crafted HDF5 file with mismatched chunk/dataspace ranks that is opened and read via H5Dopen2 and H5Dread, e.g. by the h5repack tool.", "A flaw was found in HDF5. An attacker can craft a malicious HDF5 file that, when opened and read by an application, exploits a validation bypass. This bypass, related to mismatched chunk-layout dimensionality and dataspace rank, leads to a divide-by-zero error, causing a denial of service (DoS) and application crash."], "mitigation": {"lang": "en:us", "value": "Do not open or process untrusted HDF5 files using applications or utilities (such as h5repack) linked against vulnerable versions of the HDF5 library. Ensure files originate from trusted sources or isolate untrusted file parsing within a sandboxed environment."}, "name": "CVE-2026-19025", "package_state": [{"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Affected", "package_name": "hdf5", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "hdf5", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-08-05T22:35:11Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-19025\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-19025\nhttps://github.com/HDFGroup/hdf5/issues/6491"], "statement": "A flaw was found in HDF5's H5O__layout_decode() function. When opening an existing dataset, HDF5 fails to validate that a chunked dataset's stored chunk-layout dimensionality matches its dataspace rank. An attacker can craft a malicious HDF5 file with mismatched dimensionality and trick a user or application into opening and reading it via functions like H5Dopen2() or utilities like h5repack. Processing this file triggers a divide-by-zero arithmetic exception in H5S__hyper_iter_get_seq_list(), resulting in an immediate application crash and denial of service.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.3.0]"}}], "enrichment": {"confidence": 84.0, "confidence_source": "matching", "scores": [{"score": 84.0, "source": "matching"}]}, "original": {"product": "HDF5", "source": "cna", "vendor": "The HDF Group"}, "product": "hdf5", "vendor": "hdfgroup"}], "created": "2026-08-06T00:30:03.927789+00:00", "updated": "2026-08-07T09:15:07.117615+00:00", "vendors": ["hdfgroup", "hdfgroup$PRODUCT$hdf5"]}