FKIE_CVE-2026-19027
Vulnerability from fkie_nvd - Published: 2026-08-06 00:16 - Updated: 2026-10-23 21:10| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "HDF5",
"vendor": "The HDF Group",
"versions": [
{
"status": "affected",
"version": "\u003c=2.3.0"
}
]
}
],
"source": "0253b833-3e77-4dfe-9d57-17db1a2f0a74"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The H5Z__nbit_decompress_one_byte, H5Z__nbit_decompress_one_nooptype, and H5Z__nbit_decompress_one_atomic functions in H5Znbit.c in HDF5\nprior to 2.3.0 advance a read index into the compressed chunk buffer without bounding it against the buffer\u0027s actual size. This allows attackers to cause an out-of-bounds heap read, and in constrained cases disclosure of adjacent heap memory into decompressed dataset values, via a crafted HDF5 file whose N-Bit filter parameters describe more decompressed data than the stored compressed chunk actually contains, triggered via H5Dread, e.g. by the h5ls or h5repack tools."
},
{
"lang": "es",
"value": "Las funciones H5Z__nbit_decompress_one_byte, H5Z__nbit_decompress_one_nooptype y H5Z__nbit_decompress_one_atomic en H5Znbit.c de HDF5, en versiones anteriores a 2.3.0, avanzan un \u00edndice de lectura en el b\u00fafer de fragmentos comprimidos sin limitarlo al tama\u00f1o real del b\u00fafer. Esto permite a los atacantes provocar una lectura de pila fuera de l\u00edmites (out-of-bounds heap read) y, en casos restringidos, la divulgaci\u00f3n de memoria de pila adyacente en valores de conjuntos de datos descomprimidos, a trav\u00e9s de un archivo HDF5 manipulado cuyos par\u00e1metros de filtro N-Bit describen m\u00e1s datos descomprimidos de los que el fragmento comprimido almacenado contiene realmente, lo que se activa a trav\u00e9s de H5Dread, por ejemplo, mediante las herramientas h5ls o h5repack."
}
],
"id": "CVE-2026-19027",
"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": 6.9,
"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": "PASSIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/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": "LOW",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "0253b833-3e77-4dfe-9d57-17db1a2f0a74",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-19027",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-06T14:29:51.698432Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-08-06T00:16:53.253",
"references": [
{
"source": "0253b833-3e77-4dfe-9d57-17db1a2f0a74",
"url": "https://github.com/HDFGroup/hdf5/issues/6489"
},
{
"source": "0253b833-3e77-4dfe-9d57-17db1a2f0a74",
"url": "https://github.com/HDFGroup/hdf5/issues/6492"
},
{
"source": "0253b833-3e77-4dfe-9d57-17db1a2f0a74",
"url": "https://github.com/HDFGroup/hdf5/pull/6497"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"url": "https://github.com/HDFGroup/hdf5/issues/6489"
}
],
"sourceIdentifier": "0253b833-3e77-4dfe-9d57-17db1a2f0a74",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-125"
}
],
"source": "0253b833-3e77-4dfe-9d57-17db1a2f0a74",
"type": "Secondary"
}
]
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
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