GSD-2022-1000742 netfilter: nf_tables: unregister flowtable hooks on netns exit
A use-after-free vulnerability in Linux kernel netfilter flowtable hooks allows local attackers to cause denial of service or potentially escalate privileges.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2022-1000742?
GSD-2022-1000742 is an use after free vulnerability in Kernel, published on 18 Mar 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
netfilter: nf_tables: unregister flowtable hooks on netns exit
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 v5.16.12 by commit b4fcc081e527aa2ce12e956912fc47e251f6bd27, it was introduced in version v5.5 by commit ff4bf2f42a40e7dff28379f085b64df322c70b45. For more details please see the references link.
Which versions are affected by GSD-2022-1000742?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2022-1000742?
No fix has been published for GSD-2022-1000742 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-2022-1000742 being exploited?
There is no known exploitation of GSD-2022-1000742 in the wild and no public exploit code.