GSD-2022-1004235 net: tun: unlink NAPI from device on destruction
A use-after-free vulnerability in the Linux kernel TUN driver allows local attackers to cause a denial of service or potentially execute code.
- 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-2022-1004235?
GSD-2022-1004235 is an use after free 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: unlink NAPI from device on destruction
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 v5.18.10 by commit 8661d4b8faa2f7ee7a559969c0a7c57f077b1728, it was introduced in version v4.15 by commit 943170998b200190f99d3fe7e771437e2c51f319. For more details please see the references link.
Which versions are affected by GSD-2022-1004235?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2022-1004235?
No fix has been published for GSD-2022-1004235 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-2022-1004235 being exploited?
There is no known exploitation of GSD-2022-1004235 in the wild and no public exploit code.