hw/rdma/rdma_backend.c in QEMU allows guest OS users to trigger out-of-bounds access via a PvrdmaSqWqe ring element with a large num_sge value.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2018-20124 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
CVSS3 Base Score | 5 |
---|---|
CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L |
Attack Vector | Local |
Attack Complexity | High |
Privileges Required | High |
User Interaction | None |
Scope | Changed |
Confidentiality | Low |
Integrity Impact | Low |
Availability Impact | Low |
Platform | Package | State |
---|---|---|
Red Hat OpenStack Platform 9.0 | qemu-kvm-rhev | Not affected |
Red Hat OpenStack Platform 8.0 (Liberty) | qemu-kvm-rhev | Not affected |
Red Hat OpenStack Platform 13.0 (Queens) | qemu-kvm-rhev | Not affected |
Red Hat OpenStack Platform 12.0 | qemu-kvm-rhev | Not affected |
Red Hat OpenStack Platform 10 | qemu-kvm-rhev | Not affected |
Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 | qemu-kvm-rhev | Not affected |
Red Hat Enterprise Linux 7 | qemu-kvm | Not affected |
Red Hat Enterprise Linux 7 | qemu-kvm-rhev | Not affected |
Red Hat Enterprise Linux 7 | qemu-kvm-ma | Not affected |
Red Hat Enterprise Linux 6 | qemu-kvm | Not affected |
Red Hat Enterprise Linux 5 | kvm | Not affected |
Red Hat Enterprise Linux 5 | xen | Not affected |