CVE-2021-38291

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>ffmpeg3</name>
	<range><lt>4.1.7</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>FFmpeg version (git commit de8e6e67e7523e48bb27ac224a0b446df05e1640)
	suffers from a an assertion failure at src/libavutil/mathematics.c.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2021-38291</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2021-38291</url>
    </references>
    <dates>
      <discovery>2021-08-12</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>