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CVE Record

CVE-2015-8554: Buffer overflow in hw/pt-msi.c in Xen 4.6.x and earlier, when using the qemu-xen-traditional (aka qemu-dm)...

Buffer overflow in hw/pt-msi.c in Xen 4.6.x and earlier, when using the qemu-xen-traditional (aka qemu-dm) device model, allows local x86 HVM guest administrators to gain privileges by leveraging a system with access to a passed-through MSI-X capable physical PCI device and MSI-X table entries, related to a "write path."

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

This vulnerability affects Xen hosts using older qemu-xen-traditional device emulation. A guest administrator inside an x86 HVM virtual machine could gain additional privileges when a passed-through MSI-X capable PCI device is present. The business risk is strongest for shared virtualization platforms or hosts running less-trusted guest administrators. Exposure appears limited to Xen 4.6.x and earlier systems using qemu-xen-traditional for x86 HVM guests, with physical PCI passthrough to MSI-X capable devices. Systems without HVM guests, qemu-xen-traditional, or relevant passthrough are less likely exposed based on the provided description. Treat this as high priority for virtualization platforms hosting untrusted or semi-trusted guest administrators. The required conditions are specific, but a successful issue could cross a virtualization trust boundary. If Xen passthrough is not used, urgency is lower but inventory confirmation is still needed. Mitigation focus: Inventory Xen hosts running version 4.6.x or earlier.; Identify use of qemu-xen-traditional, also called qemu-dm.; Prioritize hosts with x86 HVM guests and PCI passthrough..

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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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2Source links

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Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
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