What’s Vulnerable › Vulnerabilities

CVE-2016-5126

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-06-01 · updated 2026-06-17
• Weakness: CWE-787

Description

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.

Affected products

• Canonical Ubuntu Linux: 12.04, 14.04, 16.04
• Debian Linux: 8.0
• Oracle Corporation Oracle Linux: 7
• QEMU: through 2.6.2
• RedHat Enterprise Linux Desktop: 7.0
• RedHat Enterprise Linux Eus: 7.2, 7.3, 7.4, 7.5, 7.6, 7.7
• RedHat Enterprise Linux Server: 7.0
• RedHat Enterprise Linux Server Aus: 7.2, 7.3, 7.4, 7.6, 7.7
• RedHat Enterprise Linux Server Tus: 7.2, 7.3, 7.6, 7.7
• RedHat Enterprise Linux Workstation: 7.0
• OpenStack: 6.0, 7.0, 8, 9, 5.0
• RedHat Virtualization: 3.0

References

• http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=a6b3167fa0e825aebb5a7cd8b437b6d41584a196
• http://rhn.redhat.com/errata/RHSA-2016-1606.html
• http://rhn.redhat.com/errata/RHSA-2016-1607.html
• http://rhn.redhat.com/errata/RHSA-2016-1653.html
• http://rhn.redhat.com/errata/RHSA-2016-1654.html
• http://rhn.redhat.com/errata/RHSA-2016-1655.html
• http://rhn.redhat.com/errata/RHSA-2016-1756.html
• http://rhn.redhat.com/errata/RHSA-2016-1763.html
• http://www.openwall.com/lists/oss-security/2016/05/30/6
• http://www.openwall.com/lists/oss-security/2016/05/30/7
• http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
• http://www.securityfocus.com/bid/90948

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