The pvscsi_ring_pop_req_descr function in hw/scsi/vmw_pvscsi.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) by leveraging failure to limit process IO loop to the ring size.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2016-7421 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
Base Score | 2.3 |
---|---|
Base Metrics | AV:A/AC:M/Au:S/C:N/I:N/A:P |
Access Vector | Adjacent Network |
Access Complexity | Medium |
Authentication | Single |
Confidentiality Impact | None |
Integrity Impact | None |
Availability Impact | Partial |
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
CVSS3 Base Score | 3 |
---|---|
CVSS3 Base Metrics | CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L |
Attack Vector | Adjacent Network |
Attack Complexity | High |
Privileges Required | Low |
User Interaction | None |
Scope | Changed |
Confidentiality | None |
Integrity Impact | None |
Availability Impact | Low |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
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 Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 | qemu-kvm-rhev | Not affected |
Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 | qemu-kvm-rhev | Not affected |
Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) | qemu-kvm-rhev | Not affected |
Red Hat Enterprise Linux 7 | qemu-kvm-rhev | Will not fix |
Red Hat Enterprise Linux 7 | qemu-kvm | Will not fix |
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 |