qemu-nbd in QEMU (aka Quick Emulator) does not ignore SIGPIPE, which allows remote attackers to cause a denial of service (daemon crash) by disconnecting during a server-to-client reply attempt.
https://lists.gnu.org/archive/html/qemu-devel/2017-06/msg02693.html
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
https://bugzilla.redhat.com/show_bug.cgi?id=1466190
https://access.redhat.com/errata/RHSA-2017:3474
https://access.redhat.com/errata/RHSA-2017:3473
https://access.redhat.com/errata/RHSA-2017:3472
https://access.redhat.com/errata/RHSA-2017:3471
https://access.redhat.com/errata/RHSA-2017:3470
https://access.redhat.com/errata/RHSA-2017:3466
https://access.redhat.com/errata/RHSA-2017:2445
https://access.redhat.com/errata/RHSA-2017:2390
http://www.securityfocus.com/bid/99513