CVE-2021-47061: KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU
First published: Thu Feb 29 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU If allocating a new instance of an I/O bus fails when unregistering a device, wait to destroy the device until after all readers are guaranteed to see the new null bus. Destroying devices before the bus is nullified could lead to use-after-free since readers expect the devices on their reference of the bus to remain valid.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=5.9<5.10.37 | |
| Linux Kernel | >=5.11<5.11.21 | |
| Linux Kernel | >=5.12<5.12.4 |
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