CVE-2025-37777: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in __smb2_lease_break_noti() Move tcp_transport free to ksmbd_conn_free. If ksmbd connection is referenced when ksmbd server thread terminates, It will not be freed, but conn->tcp_transport is freed. __smb2_lease_break_noti can be performed asynchronously when the connection is disconnected. __smb2_lease_break_noti calls ksmbd_conn_write, which can cause use-after-free when conn->ksmbd_transport is already freed.

Affected products

• Linux Linux Kernel: from 5.15, before 6.6.101 (fixed in 6.6.101); from 6.7, before 6.12.26 (fixed in 6.12.26); from 6.13, before 6.14.4 (fixed in 6.14.4); version 6.15 only

Published 2025-05-01. Last modified 2026-07-30.