CVE-2026-26197

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 a file is corrupted such that
	an array datatype's size, the number of elements, and the element size
	 are not in agreement it can trigger an out of bounds read. The array
	datatype stores the full size of the datatype (`dt->shared->size`)
	separately from the number of elements (`dt->shared->u.array.nelem`)
	and the element size (`dt->shared->parent->shared->size`). If any one
	of these are corrupted so that they don't align with the others
	(element size * nelem = full size), it can lead to an out of bounds
	read. Depending on what is corrupted, it can alter the type of out of
	bounds read triggered. The vulnerability is present only in files that
	have been maliciously altered, as its generally not possible to
	independently alter the full size of the datatype, the element count
	and the element size. As such, this is only present if a malicious
	actor is altering files, and won't appear in regular usage.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-26197</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-26197</url>
    </references>
    <dates>
      <discovery>2026-07-20</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>