CVE-2024-31143 — double unlock in x86 guest IRQ handling
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 ve…
Published: 2024-07-18 · CVSS: 7.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7