CVE-2024-27397

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_tables: use timestamp to check for set element timeout

Add a timestamp field at the beginning of the transaction, store it

in the nftables per-netns area.

Update set backend .insert, .deactivate and sync gc path to use the

timestamp, this avoids that an element expires while control plane

transaction is still unfinished.

.lookup and .update, which are used from packet path, still use the

current time to check if the element has expired. And .get path and dump

also since this runs lockless under rcu read size lock. Then, there is

async gc which also needs to check the current time since it runs

asynchronously from a workqueue.