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CVE-2016-7422

The virtqueue_map_desc function in hw/virtio/virtio.c in QEMU (aka Quick Emulator) allows local...

6.0 MediumFix available

The virtqueue_map_desc function in hw/virtio/virtio.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) via a large I/O descriptor buffer length value.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
High
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.36%Down 0.9 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 6.0

The virtqueue_map_desc function in hw/virtio/virtio.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) via a large I/O descriptor buffer length value.

Record
CVE-2016-7422
CVSS 3.1
6.0 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
CVSS 2.0
2.1 LowAV:L/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-120
Updated
2026-11-02
CVE List No score

The virtqueue_map_desc function in hw/virtio/virtio.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) via a large I/O descriptor buffer length value.

Record
CVE-2016-7422
Updated
2026-11-02
EUVDEUVD-2016-8275 No score

The virtqueue_map_desc function in hw/virtio/virtio.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) via a large I/O descriptor buffer length value.

Record
EUVD-2016-8275
Updated
2026-11-03
GitHub AdvisoriesGHSA-fp4p-m87h-5fx8 6.0

The virtqueue_map_desc function in hw/virtio/virtio.c in QEMU (aka Quick Emulator) allows local...

The virtqueue_map_desc function in hw/virtio/virtio.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) via a large I/O descriptor buffer length value.

Record
GHSA-fp4p-m87h-5fx8
CVSS 3.1
6.0 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
Weakness
CWE-120
Updated
2026-11-02
OSV 6.0

The virtqueue_map_desc function in hw/virtio/virtio.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) via a large I/O descriptor buffer length value.

Record
CVE-2016-7422
CVSS 3.1
6.0 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2016-7422 6.0

The virtqueue_map_desc function in hw/virtio/virtio.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) via a large I/O descriptor buffer length value.

Record
DEBIAN-CVE-2016-7422
CVSS 3.1
6.0 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
Updated
2026-11-02
Show 4 moreShow less
OSVRHSA-2017:2392 5.5

Red Hat Security Advisory: qemu-kvm-rhev security, bug fix, and enhancement update

Record
RHSA-2017:2392
CVSS 3.0
5.5 MediumCVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L
Updated
2026-11-02
OSVRHSA-2017:2408 5.3

Red Hat Security Advisory: qemu-kvm-rhev security and bug fix update

Record
RHSA-2017:2408
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated
2026-11-02
OSVopenSUSE-SU-2024:11287-1 No score

qemu-6.1.0-32.1 on GA media

These are all security issues fixed in the qemu-6.1.0-32.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11287-1
Updated
2026-11-02
OSVSUSE-SU-2016:2879-1 No score

Security update for qemu

This update for qemu to version 2.6.2 fixes the several issues.

These security issues were fixed:

  • CVE-2016-7161: Heap-based buffer overflow in the .receive callback of xlnx.xps-ethernetlite in QEMU (aka Quick Emulator) allowed attackers to execute arbitrary code on the QEMU host via a large ethlite packet (bsc#1001151).
  • CVE-2016-7170: OOB stack memory access when processing svga command (bsc#998516).
  • CVE-2016-7466: xhci memory leakage during device unplug (bsc#1000345).
  • CVE-2016-7422: NULL pointer dereference in virtqueu_map_desc (bsc#1000346).
  • CVE-2016-7908: The mcf_fec_do_tx function in hw/net/mcf_fec.c did not properly limit the buffer descriptor count when transmitting packets, which allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via vectors involving a buffer descriptor with a length of 0 and crafted values in bd.flags (bsc#1002550).
  • CVE-2016-7995: Memory leak in ehci_process_itd (bsc#1003612).
  • CVE-2016-8576: The xhci_ring_fetch function in hw/usb/hcd-xhci.c allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) by leveraging failure to limit the number of link Transfer Request Blocks (TRB) to process (bsc#1003878).
  • CVE-2016-8578: The v9fs_iov_vunmarshal function in fsdev/9p-iov-marshal.c allowed local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) by sending an empty string parameter to a 9P operation (bsc#1003894).
  • CVE-2016-9105: Memory leakage in v9fs_link (bsc#1007494).
  • CVE-2016-8577: Memory leak in the v9fs_read function in hw/9pfs/9p.c allowed local guest OS administrators to cause a denial of service (memory consumption) via vectors related to an I/O read operation (bsc#1003893).
  • CVE-2016-9106: Memory leakage in v9fs_write (bsc#1007495).
  • CVE-2016-8669: The serial_update_parameters function in hw/char/serial.c allowed local guest OS administrators to cause a denial of service (divide-by-zero error and QEMU process crash) via vectors involving a value of divider greater than baud base (bsc#1004707).
  • CVE-2016-7909: The pcnet_rdra_addr function in hw/net/pcnet.c allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) by setting the (1) receive or (2) transmit descriptor ring length to 0 (bsc#1002557).
  • CVE-2016-9101: eepro100 memory leakage whern unplugging a device (bsc#1007391).
  • CVE-2016-8668: The rocker_io_writel function in hw/net/rocker/rocker.c allowed local guest OS administrators to cause a denial of service (out-of-bounds read and QEMU process crash) by leveraging failure to limit DMA buffer size (bsc#1004706).
  • CVE-2016-8910: The rtl8139_cplus_transmit function in hw/net/rtl8139.c allowed local guest OS administrators to cause a denial of service (infinite loop and CPU consumption) by leveraging failure to limit the ring descriptor count (bsc#1006538).
  • CVE-2016-8909: The intel_hda_xfer function in hw/audio/intel-hda.c allowed local guest OS administrators to cause a denial of service (infinite loop and CPU consumption) via an entry with the same value for buffer length and pointer position (bsc#1006536).
  • CVE-2016-7994: Memory leak in virtio_gpu_resource_create_2d (bsc#1003613).
  • CVE-2016-9104: Integer overflow leading to OOB access in 9pfs (bsc#1007493).
  • CVE-2016-8667: The rc4030_write function in hw/dma/rc4030.c allowed local guest OS administrators to cause a denial of service (divide-by-zero error and QEMU process crash) via a large interval timer reload value (bsc#1004702).
  • CVE-2016-7907: The pcnet_rdra_addr function in hw/net/pcnet.c allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) by setting the (1) receive or (2) transmit descriptor ring length to 0 (bsc#1002549).

These non-security issues were fixed:

  • Change kvm-supported.txt to be per-architecture documentation, stored in the package…
Record
SUSE-SU-2016:2879-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
qemu
Debian:12
before 1:2.7+dfsg-1
1:2.7+dfsg-1
qemu
Debian:13
before 1:2.7+dfsg-1
1:2.7+dfsg-1
qemu
Debian:14
before 1:2.7+dfsg-1
1:2.7+dfsg-1
qemu-img-rhev
Red Hat:enterprise_linux:7::hypervisor
From an advisory covering 22 CVEs
before 10:2.9.0-14.el7
10:2.9.0-14.el7
qemu-kvm-common-rhev
Red Hat:enterprise_linux:7::hypervisor
From an advisory covering 22 CVEs
before 10:2.9.0-14.el7
10:2.9.0-14.el7
qemu-kvm-rhev
Red Hat:enterprise_linux:7::hypervisor
From an advisory covering 22 CVEs
before 10:2.9.0-14.el7
10:2.9.0-14.el7
qemu-kvm-rhev-debuginfo
Red Hat:enterprise_linux:7::hypervisor
From an advisory covering 22 CVEs
before 10:2.9.0-14.el7
10:2.9.0-14.el7
qemu-kvm-tools-rhev
Red Hat:enterprise_linux:7::hypervisor
From an advisory covering 22 CVEs
before 10:2.9.0-14.el7
10:2.9.0-14.el7
qemu-img-rhev
Red Hat:openstack:10::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-common-rhev
Red Hat:openstack:10::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
Show 33 moreShow less
Affected packages
PackageAffectedFixed
qemu-kvm-rhev
Red Hat:openstack:10::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-rhev-debuginfo
Red Hat:openstack:10::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-tools-rhev
Red Hat:openstack:10::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-img-rhev
Red Hat:openstack:11::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-common-rhev
Red Hat:openstack:11::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-rhev
Red Hat:openstack:11::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-rhev-debuginfo
Red Hat:openstack:11::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-tools-rhev
Red Hat:openstack:11::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-img-rhev
Red Hat:openstack:6::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-common-rhev
Red Hat:openstack:6::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-rhev
Red Hat:openstack:6::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-rhev-debuginfo
Red Hat:openstack:6::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-tools-rhev
Red Hat:openstack:6::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-img-rhev
Red Hat:openstack:7::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-common-rhev
Red Hat:openstack:7::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-rhev
Red Hat:openstack:7::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-rhev-debuginfo
Red Hat:openstack:7::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-tools-rhev
Red Hat:openstack:7::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-img-rhev
Red Hat:openstack:8::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-common-rhev
Red Hat:openstack:8::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-rhev
Red Hat:openstack:8::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-rhev-debuginfo
Red Hat:openstack:8::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-tools-rhev
Red Hat:openstack:8::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-img-rhev
Red Hat:openstack:9::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-common-rhev
Red Hat:openstack:9::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-rhev
Red Hat:openstack:9::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-rhev-debuginfo
Red Hat:openstack:9::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu-kvm-tools-rhev
Red Hat:openstack:9::el7
From an advisory covering 23 CVEs
before 10:2.9.0-10.el7
10:2.9.0-10.el7
qemu
SUSE:Linux Enterprise Desktop 12 SP2
From an advisory covering 21 CVEs
before 2.6.2-31.2
2.6.2-31.2
qemu
SUSE:Linux Enterprise Server for Raspberry Pi 12 SP2
From an advisory covering 21 CVEs
before 2.6.2-31.2
2.6.2-31.2
qemu
SUSE:Linux Enterprise Server 12 SP2
From an advisory covering 21 CVEs
before 2.6.2-31.2
2.6.2-31.2
qemu
SUSE:Linux Enterprise Server for SAP Applications 12 SP2
From an advisory covering 21 CVEs
before 2.6.2-31.2
2.6.2-31.2
qemu
openSUSE:Tumbleweed
From an advisory covering 135 CVEs
before 6.1.0-32.1
6.1.0-32.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2016-7422 is a medium vulnerability (CVSS 6.0) in Qemu, published November 22, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.36%, the 30th percentile. Fixed in qemu 1:2.7+dfsg-1.

References

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Left out here: 292 references and the rest of 1 source description. The JSON record has them.

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