GSD-2022-1000646 rtnetlink: make sure to refresh master_dev/m_ops in __rtnl_newlink()
A use-after-free vulnerability in the Linux kernel's rtnetlink subsystem allows local attackers with high privileges to potentially execute code or 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-2022-1000646?
GSD-2022-1000646 is an use after free vulnerability in Kernel, published on 27 Feb 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
rtnetlink: make sure to refresh master_dev/m_ops in __rtnl_newlink()
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 v5.16.6 by commit 36a9a0aee881940476b254e0352581401b23f210, it was introduced in version v3.14 by commit ba7d49b1f0f8e5f24294a880ed576964059af5ef. For more details please see the references link.
Which versions are affected by GSD-2022-1000646?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2022-1000646?
No fix has been published for GSD-2022-1000646 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-2022-1000646 being exploited?
There is no known exploitation of GSD-2022-1000646 in the wild and no public exploit code.