GSD-2022-1004812 net: tun: avoid disabling NAPI twice
A double NAPI disable in the Linux kernel tun driver can cause a denial of service, requiring a kernel patch.
- 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-2022-1004812?
GSD-2022-1004812 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 v4.19.251 by commit a12fae7621434d0360202156e13969874e002661, it was introduced in version v4.19.251 by commit e90525753e3cf0566ac4917ae98785ff478ede0c. For more details please see the references link.
Which versions are affected by GSD-2022-1004812?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2022-1004812?
No fix has been published for GSD-2022-1004812 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-2022-1004812 being exploited?
There is no known exploitation of GSD-2022-1004812 in the wild and no public exploit code.