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In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix race condition between session lookup and expire
Thread A + Thread B
ksmbd_session_lookup | smb2_sess_setup
sess = xa_load |
|
| xa_erase(&conn->sessions, sess->id);
|
| ksmbd_session_destroy(sess) --> kfree(sess)
|
// UAF! |
sess->last_active = jiffies |
+
This patch add rwsem to fix race condition between ksmbd_session_lookup
and ksmbd_expire_session.
Added
Reference
Linux https://git.kernel.org/stable/c/18ced78b0ebccc2d16f426143dc56ab3aad666be [No types assigned]
Added
Reference
Linux https://git.kernel.org/stable/c/53ff5cf89142b978b1a5ca8dc4d4425e6a09745f [No types assigned]
Added
Reference
Linux https://git.kernel.org/stable/c/a2ca5fd3dbcc665e1169044fa0c9e3eba779202b [No types assigned]
Added
Reference
Linux https://git.kernel.org/stable/c/c77fd3e25a51ac92b0f1b347a96eff6a0b4f066f [No types assigned]