CVE-2026-97567 mptcp: prevent race between disconnect() and rtx
A race condition in the Linux kernel MPTCP subsystem between disconnect and retransmission can lead to inconsistent status and potential denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-97567?
CVE-2026-97567 is a vulnerability in Linux, published on 25 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
mptcp: prevent race between disconnect() and rtx
Sashiko noted that the two event can race, leading to inconsistent status. Prevent the race using the synchronous timer stop operation.
Which versions are affected by CVE-2026-97567?
How do I fix CVE-2026-97567?
Apply the vendor's patch.
Is CVE-2026-97567 being exploited?
There is no known exploitation of CVE-2026-97567 in the wild and no public exploit code.
Sources
Also known as AZL-104660, BELL-CVE-2026-97567, DEBIAN-CVE-2026-97567, GHSA-qqvj-8jm5-2jc9, UBUNTU-CVE-2026-97567.