GSD-2021-1002656 sit: do not call ipip6_dev_free() from sit_init_net()
A use-after-free vulnerability in the Linux kernel SIT module can cause a system crash, requiring a kernel patch to resolve.
- 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-2021-1002656?
GSD-2021-1002656 is an use after free vulnerability in Kernel, published on 27 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
sit: do not call ipip6_dev_free() from sit_init_net()
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 v4.19.222 by commit e56b65c1e74d7f706d74b51baba15187be2fb4b5, it was introduced in version v4.12 by commit cf124db566e6b036b8bcbe8decbed740bdfac8c6. For more details please see the references link.
Which versions are affected by GSD-2021-1002656?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1002656?
No fix has been published for GSD-2021-1002656 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-2021-1002656 being exploited?
There is no known exploitation of GSD-2021-1002656 in the wild and no public exploit code.