GSD-2021-1001593 net: sched: flower: protect fl_walk() with rcu
A race condition in the Linux kernel flower classifier allows local attackers to cause a denial of service via improper RCU protection.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1001593?
GSD-2021-1001593 is a vulnerability in Kernel, published on 19 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
net: sched: flower: protect fl_walk() with rcu
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 v5.4.151 by commit 694b0cee7f8546b69a80996a29cb3cf4149c0453, it was introduced in version v5.3 by commit d39d714969cda5cbda291402c8c6b1fb1047f42e. For more details please see the references link.
Which versions are affected by GSD-2021-1001593?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001593?
No fix has been published for GSD-2021-1001593 yet. Limit exposure of the affected software until one is available.
Is GSD-2021-1001593 being exploited?
There is no known exploitation of GSD-2021-1001593 in the wild and no public exploit code.