CVE-2026-19024HDF5 H5Pget_fill_value NULL Pointer Dereference via Malformed Fill Value Message
Updated under an hour ago ()
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It affects The HDF Group HDF5. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 8.2 HIGH (v4.0, CNA)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
- Weakness (CWE)
- CWE-476
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- HDFG
- NVD analysis
- Awaiting Analysis
- Record last updated
- Aug 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
The HDF Group HDF5 hdf_group:hdf5 (from the name) | through 2.3.0 | CNA record |
References
- https://github.com/HDFGroup/hdf5/issues/6487
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.