GSD-2021-1000017 net: Make tcp_allowed_congestion_control readonly in non-init netns
A Linux kernel vulnerability allows privileged users in non-init network namespaces to modify TCP congestion control settings, potentially leading to privilege escalation.
- 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-2021-1000017?
GSD-2021-1000017 is a vulnerability in Kernel, published on 31 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
net: Make tcp_allowed_congestion_control readonly in non-init netns
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 v5.11.16 by commit 1ccdf1bed140820240e383ba0accc474ffc7f006, it was introduced in version v5.7 by commit 9cb8e048e5d93825ec5e8dfb5b8df4987ea25745. For more details please see the references link.
Which versions are affected by GSD-2021-1000017?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000017?
No fix has been published for GSD-2021-1000017 yet. Limit exposure of the affected software until one is available.
Is GSD-2021-1000017 being exploited?
There is no known exploitation of GSD-2021-1000017 in the wild and no public exploit code.