CVE-2023-32246

ksmbd: call rcu_barrier() in ksmbd_server_exit()

3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 0.2%

exploitation probability

0.2%top 94% of all CVEs

observed exploitation

nono source reports it

In the Linux kernel, the following vulnerability has been resolved: ksmbd: call rcu_barrier() in ksmbd_server_exit() racy issue is triggered the bug by racing between closing a connection and rmmod. In ksmbd, rcu_barrier() is not called at module unload time, so nothing prevents ksmbd from getting unloaded while it still has RCU callbacks pending. It leads to trigger unintended execution of kernel code locally and use to defeat protections such as Kernel Lockdown

Affected products

Linux · Linux

References

https://git.kernel.org/stable/c/5a7090ccc242ab009ee7769e9d7fad6644dbe9bd https://git.kernel.org/stable/c/b80422474ffe44cb5e813cd6da1f1c6bc50fd9d2 https://git.kernel.org/stable/c/c053e389db0d892e2ff5a60ec5e533b976503795 https://git.kernel.org/stable/c/d4174505016a3b2996eb7ff1530dcabbf15d47b6 https://git.kernel.org/stable/c/eb307d09fe15844fdaebeb8cc8c9b9e925430aa5