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Off-by-one Error

CVE-2015-8701

Medium
6.5/10

Summary

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.

  • LOW
  • LOCAL
  • NONE
  • CHANGED
  • NONE
  • LOW
  • NONE
  • HIGH

CWE-193 - Off-by-one Error

A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.

References

Advisory Timeline

  • Published