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CVE details

CVE-2016-9921

Quick emulator (Qemu) built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to a divide by zero issue. It could occur while copying VGA data when cirrus graphics mode was set to be VGA. A privileged user inside guest could use this flaw to crash the Qemu process instance on the host, resulting in DoS.

Score
6.5 medium
Published
2016-12-23
Links
NVD · cve.org

Affected ports (1)

PortPackageVersionStatusMaintainer
emulators/qemu-cheriqemu-cheri0.d20260108unaddressedbrooks@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>qemu-cheri</name>
	<range><lt>FIXME</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>Quick emulator (Qemu) built with the Cirrus CLGD 54xx VGA Emulator
	support is vulnerable to a divide by zero issue. It could occur while
	copying VGA data when cirrus graphics mode was set to be VGA. A
	privileged user inside guest could use this flaw to crash the Qemu
	process instance on the host, resulting in DoS.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2016-9921</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2016-9921</url>
    </references>
    <dates>
      <discovery>2016-12-23</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>