CVE-2022-49920 Information

Description

In the Linux kernel the following vulnerability has been resolved:

netfilter: nf_tables: netlink notifier might race to release objects

commit release path is invoked via call_rcu and it runs lockless to release the objects after rcu grace period. The netlink notifier handler might win race to remove objects that the transaction context is still referencing from the commit release path.

Call rcu_barrier() to ensure pending rcu callbacks run to completion if the list of transactions to be destroyed is not empty.

Reference

https://git.kernel.org/stable/c/1ffe7100411a8b9015115ce124cd6c9c9da6f8e3 https://git.kernel.org/stable/c/d4bc8271db21ea9f1c86a1ca4d64999f184d4aae https://git.kernel.org/stable/c/e40b7c44d19e327ad8b49a491ef1fa8dcc4566e0