CVE-2026-23226

Summary

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: add chann_lock to protect ksmbd_chann_list xarray

ksmbd_chann_list xarray lacks synchronization, allowing use-after-free in multi-channel sessions (between lookup_chann_list() and ksmbd_chann_del).

Adds rw_semaphore chann_lock to struct ksmbd_session and protects all xa_load/xa_store/xa_erase accesses.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1d9c4172110e645b383ff13eee759728d74f1a5d < 4c2ca31608521895dd742a43beca4b4d29762345affected
LinuxLinux1d9c4172110e645b383ff13eee759728d74f1a5d < e4a8a96a93d08570e0405cfd989a8a07e5b6ff33affected
LinuxLinux1d9c4172110e645b383ff13eee759728d74f1a5d < 36ef605c0395b94b826a8c8d6f2697071173de6eaffected
LinuxLinux1d9c4172110e645b383ff13eee759728d74f1a5d < 4f3a06cc57976cafa8c6f716646be6c79a99e485affected
LinuxLinuxb1caecbf34b8c8260d851ec4efde71f3694460b7affected
LinuxLinux91bbf9cb2387a0d76322e9a343bc6bc160f66b3faffected
LinuxLinux853c416710b075153c1e1421e099ffbe5dac68ceaffected
LinuxLinux5.15.145 < 5.16affected
LinuxLinux6.1.29 < 6.2affected
LinuxLinux6.2.16 < 6.3affected
LinuxLinux6.3affected
LinuxLinux0 < 6.3unaffected
LinuxLinux6.12.77 <= 6.12.*unaffected
LinuxLinux6.18.11 <= 6.18.*unaffected
LinuxLinux6.19.1 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References