GSD-2022-1004435 net: tun: avoid disabling NAPI twice
A double NAPI disable in the Linux kernel TUN driver can cause a system crash, requiring a kernel patch to prevent denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2022-1004435?
GSD-2022-1004435 is a denial of service vulnerability in Kernel, published on 31 Jul 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
net: tun: avoid disabling NAPI twice
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 v5.15.53 by commit c28f955155037586132f8aad573e06a41d260038, it was introduced in version v5.15.53 by commit 92e4f3ee5831e025a5bcd81782b1d41b27a90c52. For more details please see the references link.
Which versions are affected by GSD-2022-1004435?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2022-1004435?
No fix has been published for GSD-2022-1004435 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-2022-1004435 being exploited?
There is no known exploitation of GSD-2022-1004435 in the wild and no public exploit code.