CVE-2026-19023

Untrusted pointer dereference in the renderbinoutput function in the h5dump tool in HDF5 before 2.3.0 allows attackers to cause a denial of service via a variable-length string dataset with more than one element dumped in binary mode, which corrupts the per-element stride calculation and causes subsequent elements to be read from a misaligned offset and dereferenced as a pointer.

Database specific

{
    "cwe_ids": [
        "CWE-822"
    ],
    "cna_assigner": "HDFG",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "last_affected": "2.3.0"
                }
            ]
        },
        {
            "source": "DESCRIPTION",
            "extracted_events": [
                {
                    "introduced": "HDF5"
                },
                {
                    "fixed": "2.3.0"
                }
            ]
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/19xxx/CVE-2026-19023.json"
}

References

Affected packages

Git / github.com/hdfgroup/hdf5

Affected ranges

Type

GIT

Repo

https://github.com/hdfgroup/hdf5

Events

Introduced

577c192518598c7e2945683655feffcdbdf5a91b

Fixed

4fde4fd787744b6a19b12032f4dad0383fbe6fbd

Database specific

{
    "source": "DESCRIPTION",
    "extracted_events": [
        {
            "introduced": "HDF5"
        },
        {
            "fixed": "2.1.1"
        }
    ]
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-19023.json"