CVE-2026-19023
Medium
Description
Untrusted pointer dereference in the render_bin_output 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.
SeverityMedium
CVSS6.8
Exploit probability—
ProductHDF5
PublishedAug 5, 2026
First seenAug 5, 2026
Weakness typeCWE-822CWE-822
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| The HDF Group HDF5 | <= 2.3.0 | — |
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