GSD-2022-1005535 KVM: Unconditionally get a ref to /dev/kvm module when creating a VM
A missing reference count in KVM VM creation can lead to a use-after-free or crash, allowing local attackers to cause denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2022-1005535?
GSD-2022-1005535 is a denial of service vulnerability in Kernel, published on 17 Sep 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
KVM: Unconditionally get a ref to /dev/kvm module when creating a VM
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 v5.15.63 by commit 177bf354200962c6f0de6dd37c86a9bf3b54003a, it was introduced in version v5.15.33 by commit 43637ee17092eef0b97a327bb4355230060431c4. For more details please see the references link.
Which versions are affected by GSD-2022-1005535?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2022-1005535?
No fix has been published for GSD-2022-1005535 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is GSD-2022-1005535 being exploited?
There is no known exploitation of GSD-2022-1005535 in the wild and no public exploit code.