CVE-2024-26708 mptcp: really cope with fastopen race
A race condition in the Linux kernel MPTCP implementation can lead to a denial of service when fastopen and subflow shutdown operations overlap.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-26708?
CVE-2024-26708 is a medium-severity vulnerability in Linux kernel, published on 3 Apr 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
mptcp: really cope with fastopen race
Fastopen and PM-trigger subflow shutdown can race, as reported by syzkaller.
In my first attempt to close such race, I missed the fact that the subflow status can change again before the subflow_state_change callback is invoked.
Address the issue additionally copying with all the states directly reachable from TCP_FIN_WAIT1.
Weakness: CWE-362
Which versions are affected by CVE-2024-26708?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-26708?
Apply the vendor's patch.
Is CVE-2024-26708 being exploited?
There is no known exploitation of CVE-2024-26708 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-26708, DEBIAN-CVE-2024-26708, GHSA-p939-fx2c-j96p, UBUNTU-CVE-2024-26708.