GSD-2021-1002745 mptcp: never allow the PM to close a listener subflow
A flaw in the Linux Kernel MPTCP subsystem allows remote attackers to cause a denial of service by closing listener subflows.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1002745?
GSD-2021-1002745 is a denial of service vulnerability in Kernel, published on 27 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
mptcp: never allow the PM to close a listener subflow
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 v5.15.11 by commit 1456a0004cc54c58adb2501cb0c95dc8b3c83e9e, it was introduced in version v5.13 by commit 740d798e8767d8a449902b1a1bbc70facfce19b5. For more details please see the references link.
Which versions are affected by GSD-2021-1002745?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1002745?
No fix has been published for GSD-2021-1002745 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is GSD-2021-1002745 being exploited?
There is no known exploitation of GSD-2021-1002745 in the wild and no public exploit code.