CVE-2026-29043: medium-severity vulnerability in HDFGroup hdf5
HDF5 H5T__ref_mem_setnull Heap Buffer Overflow
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.5epss 0.2%
HDF5 is software for managing data. In 1.14.1-2 and earlier, an attacker who can control an h5 file parsed by HDF5 can trigger a write-based heap buffer overflow condition in the H5T__ref_mem_setnull method. This can lead to a denial-of-service condition, and potentially further issues such as remote code execution depending on the practical exploitability of the heap overflow against modern operating systems.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Affected products
HDFGroup · hdf5Related CVEs — HDFGroup hdf5
In the same product, most dangerous first.
CVE-2026-26200HIGHHDF5 Affected by H5T__conv_struct_opt Heap Buffer OverflowEPSS 0.4%CVE-2026-26197MEDIUMArray full size, element count, and element size are not checked to make sure they match in H5Odtype.cEPSS 0.4%CVE-2026-26199MEDIUMBuffer underflow in `H5Iget_name `/`H5G_get_name` if size is zeroEPSS 0.4%CVE-2026-34734HIGHHDF5: H5T__conv_struct Use After FreeEPSS 0.2%