Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix smbd_connection leak on cifs_get_tcp_session() error When an RDMA connection is successfully established via smbd_get_connection() but cifs_get_tcp_session() later fails (e.g. kthread_create() returns an error), the error path frees tcp_ses without first destroying the smbd_connection. Fix this by calling smbd_destroy() in the out_err cleanup path before kfree(tcp_ses). smbd_destroy() safely handles the case where smbd_conn is NULL, so it can be called unconditionally.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund5 Oct 2026WID-SEC-2026-3743

  Linux Kernel: Multiple vulnerabilities Translated from German

  Risk mediumCVE-2026-98221CVE-2026-98181CVE-2026-98248+204 more CVEs

[ References ]References

• git.kernel.org/stable/c/3164402c58940ff58a3cecdb026405f07b0253af
• git.kernel.org/stable/c/5c908e49d349266dff0c86dda6a05df0ff19b824
• git.kernel.org/stable/c/928edc4bd6a617caabeb575fc13c254d9df623c4
• git.kernel.org/stable/c/b26a3fcf2f1c2cadba400290b639f01395db8fc8
• git.kernel.org/stable/c/e3344bb0ff5ec8a276f42239e140f5442841ef23
• git.kernel.org/stable/c/e75c96157d45e498970158c8f7373d90102e33b9