UBUNTU-CVE-2026-19028 (CVE-2026-19028)
Vulnerability from osv_ubuntu – Published: 2026-08-06 00:16 – Updated: 2026-08-13 00:02 – Source website
VLAI
Details
H5Z__filter_fletcher32 in H5Zfletcher32.c in HDF5 through 2.3.0 computes the data length to checksum by subtracting the 4-byte trailing checksum size from the input buffer size without checking that the buffer is at least 4 bytes, allowing a size_t underflow. This allows attackers to cause a denial of service (massively out-of-bounds read and application crash in H5_checksum_fletcher32) via a crafted HDF5 file with a Fletcher32-filtered chunk smaller than 4 bytes, triggered via H5Dread, e.g. by the h5ls or h5dump tools.
Severity
N/A (UNKNOWN)
References
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"aliases": [],
"details": "H5Z__filter_fletcher32 in H5Zfletcher32.c in HDF5 through 2.3.0 computes the data length to checksum by subtracting the 4-byte trailing checksum size from the input buffer size without checking that the buffer is at least 4 bytes, allowing a size_t underflow. This allows attackers to cause a denial of service (massively out-of-bounds read and application crash in H5_checksum_fletcher32) via a crafted HDF5 file with a Fletcher32-filtered chunk smaller than 4 bytes, triggered via H5Dread, e.g. by the h5ls or h5dump tools.",
"id": "UBUNTU-CVE-2026-19028",
"modified": "2026-08-13T00:02:19Z",
"published": "2026-08-06T00:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-19028"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-19028"
},
{
"type": "REPORT",
"url": "https://github.com/HDFGroup/hdf5/pull/6497"
},
{
"type": "REPORT",
"url": "https://github.com/HDFGroup/hdf5/issues/6488"
},
{
"type": "REPORT",
"url": "https://github.com/HDFGroup/hdf5/issues/6490"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "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",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-19028"
]
}
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vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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