CVE-2016-5126
HIGHCVSS 7.8/10EPSS 0.71%
Last modified
CVE-2016-5126 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.71% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Qemu | Qemu | <= 2.6.2 |
| Canonical | Ubuntu Linux | 12.04 |
| Canonical | Ubuntu Linux | 14.04 |
| Canonical | Ubuntu Linux | 16.04 |
| Oracle | Linux | 7 |
| Debian | Debian Linux | 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 |
| Redhat | Virtualization | 3.0 |
References
- http://rhn.redhat.com/errata/RHSA-2016-1606.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1607.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1653.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1654.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1655.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1756.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1763.htmlThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/05/30/6Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/05/30/7Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/90948Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-3047-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-3047-2Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1340924Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/09/msg00021.htmlMailing List, Third Party Advisory
- https://lists.gnu.org/archive/html/qemu-block/2016-05/msg00779.htmlMailing List, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/201609-01Third Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1606.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1607.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1653.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1654.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1655.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1756.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1763.htmlThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/05/30/6Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/05/30/7Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/90948Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-3047-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-3047-2Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1340924Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/09/msg00021.htmlMailing List, Third Party Advisory
- https://lists.gnu.org/archive/html/qemu-block/2016-05/msg00779.htmlMailing List, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/201609-01Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2016-5126?
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.
How severe is CVE-2016-5126?
CVE-2016-5126 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.71% probability of exploitation in the next 30 days.
How do I fix CVE-2016-5126?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2016-5126?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST