CVE-2016-5126
Quick Emulator(QEMU) built with the Block driver for iSCSI images support (virtio-blk) is vulnerable to a heap-based buffer overflow issue. The flaw could occur while processing iSCSI asynchronous I/O ioctl(2) calls. A user inside a guest could exploit this flaw to crash the QEMU process resulting in denial of service, or potentially leverage it to execute arbitrary code with QEMU-process privileges on the host.
Find out more about CVE-2016-5126 from the MITRE CVE dictionary dictionary and NIST NVD.
CVSS v2 metrics
| Base Score | 4.3 |
|---|---|
| Base Metrics | AV:A/AC:M/Au:N/C:N/I:P/A:P |
| Access Vector | Adjacent Network |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | Partial |
| Availability Impact | Partial |
CVSS v3 metrics
| CVSS3 Base Score | 5.4 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L |
| Attack Vector | Adjacent Network |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Changed |
| Confidentiality | None |
| Integrity Impact | Low |
| Availability Impact | Low |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
Red Hat Security Errata
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 7 (qemu-kvm) | RHSA-2016:1606 | 2016-08-11 |
| Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 (qemu-kvm-rhev) | RHSA-2016:1653 | 2016-08-23 |
| Red Hat OpenStack Platform 9.0 (qemu-kvm-rhev) | RHSA-2016:1763 | 2016-08-24 |
| Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts (qemu-kvm-rhev) | RHSA-2016:1607 | 2016-08-12 |
| Red Hat OpenStack Platform 8.0 (Liberty) (qemu-kvm-rhev) | RHSA-2016:1756 | 2016-08-24 |
| Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 7 (qemu-kvm-rhev) | RHSA-2016:1655 | 2016-08-23 |
| Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 (qemu-kvm-rhev) | RHSA-2016:1654 | 2016-08-23 |
Affected Packages State
| Platform | Package | State |
|---|---|---|
| Red Hat OpenStack Platform 10 | qemu-kvm-rhev | Not affected |
| Red Hat Enterprise Linux 6 | qemu-kvm | Not affected |
| Red Hat Enterprise Linux 5 | xen | Not affected |
| Red Hat Enterprise Linux 5 | kvm | Not affected |