GSD-2021-1001896 mptcp: fix possible stall on recvmsg()
A stall in the Linux Kernel MPTCP recvmsg function can cause a denial of service, requiring kernel upgrades to mitigate.
- 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-2021-1001896?
GSD-2021-1001896 is a denial of service vulnerability in Kernel, published on 28 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
mptcp: fix possible stall on recvmsg()
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 v5.14.14 by commit 1a4554e94f0deff9fc1dc5addf93fa579cc29711, it was introduced in version v5.6 by commit 7a6a6cbc3e592e339ad23e4e8ede9a3f6160bda8. For more details please see the references link.
Which versions are affected by GSD-2021-1001896?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001896?
No fix has been published for GSD-2021-1001896 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-2021-1001896 being exploited?
There is no known exploitation of GSD-2021-1001896 in the wild and no public exploit code.