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CVE Record

CVE-2015-8551: The PCI backend driver in Xen, when running on an x86 system and using Linux 3.1.x through 4.3.x as the dri...

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."

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

This flaw can let an administrator inside a specially configured Xen guest crash the host driver domain, causing service outage. The exposed scenario requires Xen on x86, a Linux driver domain in the 3.1.x through 4.3.x kernel range, and access to a passed-through MSI or MSI-X capable PCI device. Exposure is limited to Xen x86 environments using Linux 3.1.x through 4.3.x as the driver domain with PCI passthrough of MSI or MSI-X capable physical devices. Standard non-passthrough guests are not implicated by the supplied sources. Treat as a targeted availability risk. Prioritize hosts that run tenant-controlled or less-trusted guests with PCI passthrough, because a guest administrator could crash infrastructure components and disrupt other services. Mitigation focus: Review Xen XSA-157 and applicable Linux distribution advisories.; Update the Linux kernel or pciback packages in affected driver domains.; Restrict PCI passthrough to trusted guests and administrators..

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Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0ADP providers
2Source links

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Affected products

Products and packages named in the record

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