CVE-2024-45817 Affecting xen package, versions <4.18.3-r0
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Test your applications- Snyk ID SNYK-ALPINE320-XEN-8089218
- published 25 Sep 2024
- disclosed 25 Sep 2024
Introduced: 25 Sep 2024
CVE-2024-45817 Open this link in a new tabHow to fix?
Upgrade Alpine:3.20 xen to version 4.18.3-r0 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.
In x86's APIC (Advanced Programmable Interrupt Controller) architecture, error conditions are reported in a status register. Furthermore, the OS can opt to receive an interrupt when a new error occurs.
It is possible to configure the error interrupt with an illegal vector, which generates an error when an error interrupt is raised.
This case causes Xen to recurse through vlapic_error(). The recursion itself is bounded; errors accumulate in the the status register and only generate an interrupt when a new status bit becomes set.
However, the lock protecting this state in Xen will try to be taken recursively, and deadlock.