GSD-2021-1000299 KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU
A use-after-free vulnerability in KVM I/O bus device unregistration allows local attackers to cause denial of service or escalate privileges.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1000299?
GSD-2021-1000299 is an use after free vulnerability in Kernel, published on 31 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
KVM: Destroy I/O bus devices on unregister failure after sync'ing SRCU
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.12.4 by commit 30f46c6993731efb2a690c9197c0fd9ed425da2d, it was introduced in version v5.9 by commit f65886606c2d3b562716de030706dfe1bea4ed5e. For more details please see the references link.
Which versions are affected by GSD-2021-1000299?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000299?
No fix has been published for GSD-2021-1000299 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is GSD-2021-1000299 being exploited?
There is no known exploitation of GSD-2021-1000299 in the wild and no public exploit code.