CVE-2026-19024: high-severity vulnerability in The HDF Group HDF5
HDF5 H5Pget_fill_value NULL Pointer Dereference via Malformed Fill Value Message
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.2epss 0.2%
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.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
Affected products
The HDF Group · HDF5Related CVEs — The HDF Group HDF5
In the same product, most dangerous first.
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