CVE-2026-68161
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk10th percentile - higher than 10% of all known CVEs
Summary
In the Linux kernel, SCTP UDP tunnel sockets were not closed during network namespace teardown, potentially leading to races and improper state. The fix closes these sockets in sctp_ctrlsock_exit() after unregistering the sysctl table.
Risk Assessment
The organization may experience system instability or resource leaks during network namespace teardown, potentially leading to crashes or unpredictable behavior.
Recommendation
It is recommended to apply the Linux kernel update containing this fix as soon as possible and monitor for SCTP-related error messages.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: sctp: close UDP tunnel sockets during netns teardown proc_sctp_do_udp_port() starts per-net SCTP UDP tunneling sockets when net.sctp.udp_port is set, and stops/restarts them when the sysctl value changes. The netns exit path does not stop these sockets, so a namespace can be torn down while its SCTP UDP tunnel sockets are still installed. Close the UDP tunnel sockets from sctp_ctrlsock_exit() after unregistering the per-net sysctl table. This prevents new sysctl writes from racing in while the sockets are being released, and closes the sockets before the control socket is destroyed.