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    CVE-2026-19024

    NULL pointer dereference in H5Pget_fill_value in HDF5 before 2.3.0 allows attackers to cause a denial of service via a dataset whose version 1 or 2 fill value message has the "defined" flag set together with a negative size field, which is not normalized to the library's "undefined" sentinel and reaches H5T_path_find with a NULL datatype.

    Published:Aug 5, 2026
    Last Modified:Aug 7, 2026
    EPS:Aug 5, 2026
    EPSS Score:0.00126
    CVSS Score:8.2

    Affected Products

    Vendor
    Hdfgroup
    Product
    Hdf5

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-17574 (CVSS 5.2) — HDF5 contains a NULL pointer dereference vulnerability. Processing a crafted HDF5 file containing an attribute…
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    CVE-2026-17572 (CVSS 5.5) — Heap-based buffer overflow in the SOHM list-index deserialization code in HDF5 through 2.1.1 on all platforms …
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High