CVE-2024-31143 Information

Description

An optional feature of PCI MSI called \Multiple Message\ allows a device to use multiple consecutive interrupt vectors. Unlike for MSI-X the setting up of these consecutive vectors needs to happen all in one go. In this handling an error path could be taken in different situations with or without a particular lock held. This error path wrongly releases the lock even when it is not currently held.

Reference

https://xenbits.xenproject.org/xsa/advisory-458.html