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CVE details

CVE-2026-25210

In libexpat before 2.7.4, the doContent function does not properly determine the buffer size bufSize because there is no integer overflow check for tag buffer reallocation.

Score
6.9 medium
Published
2026-01-30
Links
NVD · cve.org

Affected ports (3)

PortPackageVersionStatusMaintainer
textproc/linux-c7-expatlinux-c7-expat2.1.0_5unaddressedemulation@FreeBSD.org
textproc/linux-c7-expat-devellinux-c7-expat-devel2.1.0_1unaddressedemulation@FreeBSD.org
textproc/linux-rl9-expatlinux-rl9-expat2.5.0_8unaddressedemulation@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</name>
	<range><lt>2.7.4</lt></range>
      </package>
      <package>
	<name>linux-c7-expat-devel</name>
	<range><lt>2.7.4</lt></range>
      </package>
      <package>
	<name>linux-rl9-expat</name>
	<range><lt>2.7.4</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>In libexpat before 2.7.4, the doContent function does not properly
	determine the buffer size bufSize because there is no integer overflow
	check for tag buffer reallocation.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-25210</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-25210</url>
    </references>
    <dates>
      <discovery>2026-01-30</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>