CVE-2026-26197

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If any one of these are corrupted so that they don't align with the others (element size * nelem = full size), it can lead to an out of bounds read. Depending on what is corrupted, it can alter the type of out of bounds read triggered. The vulnerability is present only in files that have been maliciously altered, as its generally not possible to independently alter the full size of the datatype, the element count and the element size. As such, this is only present if a malicious actor is altering files, and won't appear in regular usage."}, {"lang": "es", "value": "HDF5 es una biblioteca de alto rendimiento y una especificaci\u00f3n de formato de archivo que implementa el modelo de datos HDF5. Si un archivo est\u00e1 corrupto de tal manera que el tama\u00f1o de un tipo de datos de array, el n\u00famero de elementos y el tama\u00f1o del elemento no concuerdan, puede desencadenar una lectura fuera de l\u00edmites. El tipo de datos de array almacena el tama\u00f1o completo del tipo de datos (\u2019dt -> shared -> size\u2019) por separado del n\u00famero de elementos (\u2019dt -> shared -> u.array.nelem\u2019) y el tama\u00f1o del elemento (\u2019dt -> shared -> parent -> shared -> size\u2019). Si cualquiera de estos est\u00e1 corrupto de modo que no se alinea con los dem\u00e1s (tama\u00f1o del elemento * nelem = tama\u00f1o completo), puede llevar a una lectura fuera de l\u00edmites. Dependiendo de lo que est\u00e9 corrupto, puede alterar el tipo de lectura fuera de l\u00edmites desencadenada. La vulnerabilidad est\u00e1 presente solo en archivos que han sido alterados maliciosamente, ya que generalmente no es posible alterar independientemente el tama\u00f1o completo del tipo de datos, el recuento de elementos y el tama\u00f1o del elemento. Como tal, esto solo est\u00e1 presente si un actor malicioso est\u00e1 alterando archivos, y no aparecer\u00e1 en el uso regular."}], "id": "CVE-2026-26197", "lastModified": "2026-10-24T20:10:00.137", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.9, "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": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/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": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-26197", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-20T15:32:48.424585Z", "version": "2.0.3"}}]}, "published": "2026-07-20T16:16:57.400", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/HDFGroup/hdf5/security/advisories/GHSA-gh44-7wpq-622f"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/HDFGroup/hdf5/security/advisories/GHSA-gh44-7wpq-622f"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{"bugzilla": {"description": "hdf5: HDF5: Out-of-bounds read due to corrupted file can lead to denial of service", "id": "2502846", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502846"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in HDF5, a high-performance library and file format specification. A remote attacker can exploit this vulnerability by providing a maliciously altered HDF5 file. If the file's array datatype has inconsistent size, element count, or element size, it can trigger an out-of-bounds read. 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"cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-workbench-jupyter-datascience-cpu-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-workbench-jupyter-minimal-cpu-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-workbench-jupyter-minimal-cuda-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-workbench-jupyter-minimal-rocm-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-workbench-jupyter-pytorch-llmcompressor-cuda-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}], "public_date": "2026-07-20T14:55:50Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-26197\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-26197\nhttps://github.com/HDFGroup/hdf5/security/advisories/GHSA-gh44-7wpq-622f"], "statement": "This Moderate flaw in HDF5 is due to an out-of-bounds read when processing a maliciously crafted HDF5 file with inconsistent array datatype metadata. Exploitation requires an attacker to provide a specially altered file, which can lead to a denial of service by crashing the application. Regular usage of HDF5 is not affected.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.0.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "hdf5", "source": "cna", "vendor": "HDFGroup"}, "product": "hdf5", "vendor": "hdfgroup"}], "created": "2026-07-20T23:45:04.952151+00:00", "updated": "2026-07-30T19:30:09.696962+00:00", "vendors": ["hdfgroup", "hdfgroup$PRODUCT$hdf5"]}