Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix rlist race and missing initialization TCP_Server_Info.rlist is allocated via kzalloc which zeros both ->next and ->prev to NULL instead of pointing to itself, making list_empty() always return false and list_add() dereference a NULL ->prev pointer. Also, cifs_signal_cifsd_for_reconnect() can be called concurrently from multiple cifsd threads, allowing the same server's rlist node to be added twice into the local list, corrupting it.

[ 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/04082b1833856cb9ed87e0d3d5f04cbf836cf7da
• git.kernel.org/stable/c/5a8f82f9c5839389cf4036029dd75a9911049e83
• git.kernel.org/stable/c/5f270f091256da1338c3631083e15d7f83cc05e1
• git.kernel.org/stable/c/b5f924ffbfa976e4b97f17e8132c595b97482c2d
• git.kernel.org/stable/c/c037d6bde3dd5fa00b017b6b98a5389ec0ebc02f