CVE-2025-37777
HIGH severity · CVSS 8.8 · Use-after-free
8.8CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/1aec4d14cf81b7b3e7b69eb1cfa94144eed7138e ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/1aec4d14cf81b7b3e7b69eb1cfa94144eed7138ePatch
- https://git.kernel.org/stable/c/1da8bd9a10ecd718692732294d15fd801c0eabb5Patch
- https://git.kernel.org/stable/c/21a4e47578d44c6b37c4fc4aba8ed7cc8dbb13dePatch
- https://git.kernel.org/stable/c/e59796fc80603bcd8569d4d2e10b213c1918edb4Patch