CVE-2020-15859 QEMU: net: e1000e: use-after-free while sending packets

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

  Hello,

A use-after-free issue was found in the INTEL 82574 NIC (e1000e) emulator of 
the QEMU. It could occur while sending packets if the guest user set the 
packet data address to e1000e's MMIO address. A guest user/process could use 
this flaw to crash the QEMU process on the host resulting in DoS scenario.

Upstream patch:
----------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2020-07/msg05895.html

Reference:
----------
  -> https://bugs.launchpad.net/qemu/+bug/1886362

This issue was reported by Alexander Bulekov. CVE-2020-15859 assigned via 
Mitre.

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