CVE-2024-31143
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.
| Software | From | Fixed in |
|---|---|---|
| xen / xen | 4.4.0 | 4.4.0.x |
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