CVE-2025-37899: Linux Kernel

High severity, CVSS 7.8. EPSS: 1% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in session logoff The sess->user object can currently be in use by another thread, for example if another connection has sent a session setup request to bind to the session being free'd. The handler for that connection could be in the smb2_sess_setup function which makes use of sess->user.

Affected products

• Linux Linux Kernel: from 5.15, before 6.12.28 (fixed in 6.12.28); from 6.13, before 6.14.6 (fixed in 6.14.6); version 6.15 only

Published 2025-05-20. Last modified 2026-07-30.