Quick Emulator(Qemu) built with the virtio-9p back-end support is vulnerable to a memory leakage issue. It could occur while doing a I/O operation via v9fscreate/v9fslcreate routine.

A privileged user/process inside guest could use this flaw to leak host memory resulting in Dos.

Upstream patch: --------------- -> https://lists.gnu.org/archive/html/qemu-devel/2017-03/msg05449.html

Reference: ---------- -> http://www.openwall.com/lists/oss-security/2017/04/03/2

Quick emulator(Qemu) built with the SDHCI device emulation support is vulnerable to an infinite loop issue. It could occur while doing a multi block SDMA transfer via 'sdhcisdmatransfermultiblocks' routine.

A privileged user inside guest could use this flaw to crash the Qemu process resulting in DoS.

Upstream patch: --------------- -> https://lists.gnu.org/archive/html/qemu-devel/2017-02/msg02776.html

Reference: ---------- -> http://www.openwall.com/lists/oss-security/2017/02/14/8

Memory leak in the serialexitcore function in hw/char/serial.c in QEMU (aka Quick Emulator) allows local guest OS privileged users to cause a denial of service (host memory consumption and QEMU process crash) via a large number of device unplug operations.

Memory leak in the v9fslistxattr function in hw/9pfs/9p-xattr.c in QEMU (aka Quick Emulator) allows local guest OS privileged users to cause a denial of service (memory consumption) via vectors involving the origvalue variable.

Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System (9pfs) support, is vulnerable to an improper access control issue. It could occur while accessing files on a shared host directory. A privileged user inside guest could use this flaw to access host file system beyond the shared folder and potentially escalating their privileges on a host.