This bug was fixed in the package qemu - 1:2.11+dfsg-1ubuntu7.31

---------------
qemu (1:2.11+dfsg-1ubuntu7.31) bionic-security; urgency=medium

  * SECURITY UPDATE: out-of-bounds read in slirp networking
    - debian/patches/CVE-2020-10756.patch: drop bogus IPv6 messages in
      slirp/src/ip6_input.c.
    - CVE-2020-10756
  * SECURITY UPDATE: out-of-bounds read and write in sm501
    - debian/patches/CVE-2020-12829-pre1.patch: use values from the pitch
      register for 2D operations.
    - debian/patches/CVE-2020-12829-pre2.patch: implement negated
      destination raster operation mode.
    - debian/patches/CVE-2020-12829-pre3.patch: log unimplemented raster
      operation modes.
    - debian/patches/CVE-2020-12829-pre4.patch: fix support for non-zero
      frame buffer start address.
    - debian/patches/CVE-2020-12829-pre5.patch: set updated region dirty
      after 2D operation.
    - debian/patches/CVE-2020-12829-pre6.patch: adjust endianness of pixel
      value in rectangle fill.
    - debian/patches/CVE-2020-12829-pre7.patch: convert printf +
      abort to qemu_log_mask.
    - debian/patches/CVE-2020-12829-pre8.patch: shorten long
      variable names in sm501_2d_operation.
    - debian/patches/CVE-2020-12829-pre9.patch: use BIT(x) macro to
      shorten constant.
    - debian/patches/CVE-2020-12829-pre10.patch: clean up local
      variables in sm501_2d_operation.
    - debian/patches/CVE-2020-12829.patch: replace hand written
      implementation with pixman where possible.
    - debian/patches/CVE-2020-12829-2.patch: optimize small overlapping
      blits.
    - debian/patches/CVE-2020-12829-3.patch: fix bounds checks.
    - debian/patches/CVE-2020-12829-4.patch: drop unneded variable.
    - debian/patches/CVE-2020-12829-5.patch: do not allow guest to set
      invalid format.
    - debian/patches/CVE-2020-12829-6.patch: introduce variable for
      commonly used value for better readability.
    - debian/patches/CVE-2020-12829-7.patch: fix and optimize overlap
      check.
    - CVE-2020-12829
  * SECURITY UPDATE: out-of-bounds read during sdhci_write() operations
    - debian/patches/CVE-2020-13253.patch: do not switch to ReceivingData
      if address is invalid in hw/sd/sd.c.
    - CVE-2020-13253
  * SECURITY UPDATE: out-of-bounds access during es1370_write() operation
    - debian/patches/CVE-2020-13361.patch: check total frame count against
      current frame in hw/audio/es1370.c.
    - CVE-2020-13361
  * SECURITY UPDATE: out-of-bounds read via crafted reply_queue_head
    - debian/patches/CVE-2020-13362-1.patch: use unsigned type for
      reply_queue_head and check index in hw/scsi/megasas.c.
    - debian/patches/CVE-2020-13362-2.patch: avoid NULL pointer dereference
      in hw/scsi/megasas.c.
    - debian/patches/CVE-2020-13362-3.patch: use unsigned type for positive
      numeric fields in hw/scsi/megasas.c.
    - CVE-2020-13362
  * SECURITY UPDATE: NULL pointer dereference related to BounceBuffer
    - debian/patches/CVE-2020-13659.patch: set map length to zero when
      returning NULL in exec.c, include/exec/memory.h.
    - CVE-2020-13659
  * SECURITY UPDATE: out-of-bounds access via msi-x mmio operation
    - debian/patches/CVE-2020-13754-1.patch: revert accepting mismatching
      sizes in memory_region_access_valid in memory.c.
    - debian/patches/CVE-2020-13754-2.patch: accept byte and word access to
      core ACPI registers in hw/acpi/core.c.
    - CVE-2020-13754
  * SECURITY UPDATE: invalid memory copy operation via rom_copy
    - debian/patches/CVE-2020-13765.patch: add extra check to
      hw/core/loader.c.
    - CVE-2020-13765
  * SECURITY UPDATE: buffer overflow in XGMAC Ethernet controller
    - debian/patches/CVE-2020-15863.patch: check bounds in hw/net/xgmac.c.
    - CVE-2020-15863
  * SECURITY UPDATE: reachable assertion failure
    - debian/patches/CVE-2020-16092.patch: fix assertion failure in
      hw/net/net_tx_pkt.c.
    - CVE-2020-16092

 -- Marc Deslauriers <email address hidden>  Tue, 11 Aug 2020 13:19:33 -0400