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CVE details

CVE-2026-56132

In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers.

Score
6.9 medium
Published
2026-06-19
Links
NVD · cve.org

Affected ports (3)

PortPackageVersionStatusMaintainer
textproc/linux-c7-expat-devellinux-c7-expat-devel2.1.0_1unaddressedemulation@FreeBSD.org
textproc/linux-c7-expatlinux-c7-expat2.1.0_5VuXML onlyemulation@FreeBSD.org
textproc/linux-rl9-expatlinux-rl9-expat2.5.0_8VuXML onlyemulation@FreeBSD.org

VuXML

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>linux-c7-expat-devel</name>
	<range><lt>2.8.2</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>In libexpat before 2.8.2, there is a heap-based buffer overflow in
	doProlog in xmlparse.c because scaffold backing array reallocation is
	mishandled when there is data-structure sharing across parsers.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-56132</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-56132</url>
    </references>
    <dates>
      <discovery>2026-06-19</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>