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CVE details

CVE-2015-8701

QEMU (aka Quick Emulator) built with the Rocker switch emulation support is vulnerable to an off-by-one error. It happens while processing transmit (tx) descriptors in 'tx_consume' routine, if a descriptor was to have more than allowed (ROCKER_TX_FRAGS_MAX=16) fragments. A privileged user inside guest could use this flaw to cause memory leakage on the host or crash the QEMU process instance resulting in DoS issue.

Score
6.5 medium
Published
2016-12-29
Links
NVD · cve.org

Affected ports (1)

PortPackageVersionStatusMaintainer
emulators/qemu-cheriqemu-cheri0.d20260108unaddressedbrooks@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>qemu-cheri</name>
	<range><lt>FIXME</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>QEMU (aka Quick Emulator) built with the Rocker switch emulation
	support is vulnerable to an off-by-one error. It happens while
	processing transmit (tx) descriptors in 'tx_consume' routine, if a
	descriptor was to have more than allowed (ROCKER_TX_FRAGS_MAX=16)
	fragments. A privileged user inside guest could use this flaw to cause
	memory leakage on the host or crash the QEMU process instance
	resulting in DoS issue.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2015-8701</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2015-8701</url>
    </references>
    <dates>
      <discovery>2016-12-29</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>