CVE-2023-46839 Affecting xen package, versions <4.18.0-r3
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Test your applications- Snyk ID SNYK-ALPINE320-XEN-7012708
- published 23 May 2024
- disclosed 20 Mar 2024
Introduced: 20 Mar 2024
CVE-2023-46839 Open this link in a new tabHow to fix?
Upgrade Alpine:3.20 xen to version 4.18.0-r3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream xen package and not the xen package as distributed by Alpine.
See How to fix? for Alpine:3.20 relevant fixed versions and status.
PCI devices can make use of a functionality called phantom functions, that when enabled allows the device to generate requests using the IDs of functions that are otherwise unpopulated. This allows a device to extend the number of outstanding requests.
Such phantom functions need an IOMMU context setup, but failure to setup the context is not fatal when the device is assigned. Not failing device assignment when such failure happens can lead to the primary device being assigned to a guest, while some of the phantom functions are assigned to a different domain.