CVE-2024-45817

Description

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.

How to fix CVE-2024-45817

To remediate CVE-2024-45817, upgrade the affected package to a fixed version below.

• —upgrade to 4.16.6-r2 or later
• —no fix listed

Is CVE-2024-45817 being exploited?

Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 4.16.6-r2
• from 0

CVSS scores

References (2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2024-45817
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2024-45817