CVE-2026-45918

The record

In the Linux kernel, the following vulnerability has been resolved: ovpn: tcp - don't deref NULL sk_socket member after tcp_close() When deleting a peer in case of keepalive expiration, the peer is removed from the OpenVPN hashtable and is temporary inserted in a "release list" for further processing. This happens in: ovpn_peer_keepalive_work() unlock_ovpn(release_list) This processing includes detaching from the socket being used to talk to this peer, by restoring its original proto and socket ops/callbacks. In case of TCP it may happen that, while the peer is sitting in the release list, userspace decides to close the socket. This will result in a concurrent execution of: tcp_close(sk) __tcp_close(sk) sock_orphan(sk) sk_set_socket(sk, NULL) The last function call will set sk->sk_socket to NULL. When the releasing routine is resumed, ovpn_tcp_socket_detach() will attempt to dereference sk->sk_socket to restore its original ops member. This operation will crash due to sk->sk_socket being NULL. Fix this race condition by testing-and-accessing sk->sk_socket atomically under sk->sk_callback_lock.

Affected packages

Related vulnerabilities

• CVE-2026-62966 ESPAsyncWebServer is an asynchronous HTTP and WebSocket server library for ESP32… CWE-476
• CVE-2026-59993 Picotls is a TLS protocol library that allows users select different crypto backends… CWE-476
• CVE-2026-62298 mouse07410/asn1c is an ASN.1 compiler. CWE-476
• CVE-2026-119842 A flaw was found in GStreamer's gst-plugins-base MicroDVD subtitle parser. CWE-476
• CVE-2026-120046 Nezha 2.0.0 before 2.4.0 contains a NULL pointer dereference vulnerability in… CWE-476
• CVE-2026-119728 A flaw was found in the H.264 video parser in gst-plugins-bad. CWE-476
• CVE-2026-119760 sniproxy through 0.7.0 contains a NULL pointer dereference vulnerability in… CWE-476
• CVE-2026-105924 A NULL pointer dereference vulnerability in the Qt QCborValue to JSON conversion of the… CWE-476