CVE-2020-15469 QEMU: MMIO ops null pointer dereference may lead to DoS

[P J P <ppandit () redhat com>]

  Hello,

A NULL pointer dereference issue was found in various system emulators of 
QEMU. It could occur while performing MMIO r/w operations, in case the 
respective handler function is not defined. A privileged guest user able to 
invoke MMIO operation may use this flaw to crash the QEMU process on the host 
resulting in DoS scenario.

Upstream patch(es):
-------------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2020-06/msg09961.html

This issue was reported by Lei Sun(CC'd); CVE-2020-15469 assigned via
-> https://cveform.mitre.org/.

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
8685 545E B54C 486B C6EB 271E E285 8B5A F050 DE8D