CVE-2026-98174

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b5f924ffbfa976e4b97f17e8132c595b97482c2daffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5a8f82f9c5839389cf4036029dd75a9911049e83affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 04082b1833856cb9ed87e0d3d5f04cbf836cf7daaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c037d6bde3dd5fa00b017b6b98a5389ec0ebc02faffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5f270f091256da1338c3631083e15d7f83cc05e1affected
LinuxLinux0 < 6.6.158affected
LinuxLinux0 < 6.12.112affected
LinuxLinux0 < 6.18.54affected
LinuxLinux0 < 7.2.8affected
LinuxLinux6.6.158 <= 6.6.*unaffected
LinuxLinux6.12.112 <= 6.12.*unaffected
LinuxLinux6.18.54 <= 6.18.*unaffected
LinuxLinux7.2.8 <= 7.2.*unaffected
LinuxLinux7.3-rc4 <= *unaffected

Weaknesses

References