CVE-2026-17573: medium-severity vulnerability in The HDF Group HDF5
Double Free in H5D__chunk_copy() in HDF5 via a Crafted Chunk-Index Size Field
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4epss 0.2%
A double free vulnerability was discovered in the HDF5 library. Processing a crafted HDF5 file containing an oversized chunk size field via h5repack may cause the application to abort due to a double free.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U
Affected products
The HDF Group · HDF5Related CVEs — The HDF Group HDF5
In the same product, most dangerous first.
CVE-2026-92627MEDIUMHeap Use-After-Free in H5T__conv_f_fEPSS 0.2%CVE-2026-19028MEDIUMHDF5 integer underflow in Fletcher32 filter leads to massive out-of-bounds readEPSS 0.2%CVE-2026-19027MEDIUMHDF5 out-of-bounds heap read in N-Bit filter decompressionEPSS 0.2%CVE-2026-19026MEDIUMNbit filter NULL/short parameter-array dereferenceEPSS 0.2%CVE-2026-19024HIGHHDF5 H5Pget_fill_value NULL Pointer Dereference via Malformed Fill Value MessageEPSS 0.2%CVE-2026-19025MEDIUMHDF5 divide-by-zero (SIGFPE) via mismatched chunk-layout dimensionality and dataspace rank on dataset openEPSS 0.2%