CVE-2023-52480 Information

Description

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.

Reference

https://git.kernel.org/stable/c/c77fd3e25a51ac92b0f1b347a96eff6a0b4f066f https://git.kernel.org/stable/c/a2ca5fd3dbcc665e1169044fa0c9e3eba779202b https://git.kernel.org/stable/c/18ced78b0ebccc2d16f426143dc56ab3aad666be https://git.kernel.org/stable/c/53ff5cf89142b978b1a5ca8dc4d4425e6a09745f