high
7.8
CWE
787 119
Advisory Published
CVE Published
Updated

CVE-2016-5126: Buffer Overflow

First published: Mon May 30 2016(Updated: )

Heap-based buffer overflow in the iscsi_aio_ioctl function in block/iscsi.c in QEMU allows local guest OS users to cause a denial of service (QEMU process crash) or possibly execute arbitrary code via a crafted iSCSI asynchronous I/O ioctl call.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
QEMU KVM<=2.6.2
Ubuntu=12.04
Ubuntu=14.04
Ubuntu=16.04
Oracle Linux=7
Debian=8.0
redhat openstack=6.0
redhat openstack=7.0
redhat openstack=8
redhat openstack=9
redhat enterprise Linux desktop=7.0
redhat enterprise Linux eus=7.2
redhat enterprise Linux eus=7.3
redhat enterprise Linux eus=7.4
redhat enterprise Linux eus=7.5
redhat enterprise Linux eus=7.6
redhat enterprise Linux eus=7.7
redhat enterprise Linux server=7.0
redhat enterprise Linux server aus=7.2
redhat enterprise Linux server aus=7.3
redhat enterprise Linux server aus=7.4
redhat enterprise Linux server aus=7.6
redhat enterprise Linux server aus=7.7
redhat enterprise Linux server tus=7.2
redhat enterprise Linux server tus=7.3
redhat enterprise Linux server tus=7.6
redhat enterprise Linux server tus=7.7
redhat enterprise Linux workstation=7.0
redhat openstack=5.0
Red Hat Enterprise Virtualization=3.0
Red Hat Enterprise Linux=7.0

Remedy

https://lists.gnu.org/archive/html/qemu-block/2016-05/msg00779.html

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2016-5126?

    The severity of CVE-2016-5126 is classified as critical due to its potential to cause denial of service and possible arbitrary code execution.

  • How do I fix CVE-2016-5126?

    To fix CVE-2016-5126, you should upgrade QEMU to version 2.6.3 or later where the vulnerability has been patched.

  • What systems are affected by CVE-2016-5126?

    CVE-2016-5126 affects various versions of QEMU and multiple Linux distributions including Ubuntu 12.04, 14.04, and 16.04, among others.

  • What type of vulnerability is CVE-2016-5126?

    CVE-2016-5126 is a heap-based buffer overflow vulnerability found in the iscsi_aio_ioctl function of QEMU.

  • What can be done if I cannot upgrade my system to patch CVE-2016-5126?

    If you cannot upgrade, consider restricting access to the QEMU instance and applying network security measures to minimize exposure.

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