The PCI backend driver in Xen, when running on an x86 system and using Linux 3.1.x through 4.3.x as the driver domain, allows local guest administrators to hit BUG conditions and cause a denial of service (NULL pointer dereference and host OS crash) by leveraging a system with access to a passed-through MSI or MSI-X capable physical PCI device and a crafted sequence of XEN_PCI_OP_* operations, aka "Linux pciback missing sanity checks."
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2015-8551 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 | 5.2 |
---|---|
Base Metrics | AV:A/AC:M/Au:S/C:N/I:N/A:C |
Access Vector | Adjacent Network |
Access Complexity | Medium |
Authentication | Single |
Confidentiality Impact | None |
Integrity Impact | None |
Availability Impact | Complete |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
Platform | Package | State |
---|---|---|
Red Hat Enterprise Linux 5 | kernel-xen | Will not fix |