CVE-2026-106547HDF5 heap buffer overflow in H5VM_array_fill via crafted fill-value metadata
Updated under an hour ago ()
Does this affect you?
It affects The HDF Group HDF5. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.16%, higher than 5% of scored CVEs.
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A heap-based buffer overflow in H5VM_array_fill() in src/H5VM.c in HDF5 before 2.2.0 lets a remote attacker cause an application crash and possibly execute arbitrary code with a crafted HDF5 file. When a dataset's unallocated chunks are read, H5D__fill_init() fills the fill-value buffer from datatype and dataspace metadata in the file. If that metadata is inconsistent with the buffer's allocated size, the write goes past the end of the buffer. The attacker can control the content written through the fill value stored in the file.
- CVSS
- 8.5 HIGH (v4.0, CNA)CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-122
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.16% (percentile 5)
- Assigned by
- HDFG
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
The HDF Group HDF5 hdf_group:hdf5 (from the name) | from 1.10.0 before 2.2.0 | CNA record |
References
- https://github.com/HDFGroup/hdf5/pull/6529
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.