CVE details
CVE-2026-26199
HDF5 is a high-performance library and a file format specification that implements the HDF5 data model. If `H5Iget_name` is invoked on a group id with `0` for the size parameter, it will underflow when trying to place a null terminator in the buffer. This can occur if `H5Iget_name` is invoked in a way where `size` can be forced to zero, and there is important data before the `name` buffer.
Affected ports (3)
| Port | Package | Version | Status | Maintainer |
|---|---|---|---|---|
| science/hdf5 | hdf5 | 1.12.2_2,1 | unaddressed | sunpoet@FreeBSD.org |
| science/hdf5-110 | hdf5-110 | 1.10.11 | unaddressed | sunpoet@FreeBSD.org |
| science/hdf5-18 | hdf5-18 | 1.8.23 | unaddressed | thierry@FreeBSD.org |
Template for a VuXML entry
Range taken from the CVE record, check it before committing. make newentry in security/vuxml creates the vid.
<vuln vid="FIXME (make newentry)">
<topic>FIXME -- FIXME</topic>
<affects>
<package>
<name>hdf5</name>
<range><lt>2.1.0</lt></range>
</package>
<package>
<name>hdf5-110</name>
<range><lt>2.1.0</lt></range>
</package>
<package>
<name>hdf5-18</name>
<range><lt>2.1.0</lt></range>
</package>
</affects>
<description>
<body xmlns="http://www.w3.org/1999/xhtml">
<p>HDF5 is a high-performance library and a file format specification
that implements the HDF5 data model. If `H5Iget_name` is invoked on a
group id with `0` for the size parameter, it will underflow when
trying to place a null terminator in the buffer. This can occur if
`H5Iget_name` is invoked in a way where `size` can be forced to zero,
and there is important data before the `name` buffer.</p>
</body>
</description>
<references>
<cvename>CVE-2026-26199</cvename>
<url>https://nvd.nist.gov/vuln/detail/CVE-2026-26199</url>
</references>
<dates>
<discovery>2026-07-20</discovery>
<entry>2026-10-25</entry>
</dates>
</vuln>