Vulnerability CVE-2024-27019
Published: 2024-05-01

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

netfilter: nf_tables: Fix potential data-race in __nft_obj_type_get()

nft_unregister_obj() can concurrent with __nft_obj_type_get(),
and there is not any protection when iterate over nf_tables_objects
list in __nft_obj_type_get(). Therefore, there is potential data-race
of nf_tables_objects list entry.

Use list_for_each_entry_rcu() to iterate over nf_tables_objects
list in __nft_obj_type_get(), and use rcu_read_lock() in the caller
nft_obj_type_get() to protect the entire type query process.

 References:
https://git.kernel.org/stable/c/379bf7257bc5f2a1b1ca8514e08a871b7bf6d920
https://git.kernel.org/stable/c/df7c0fb8c2b9f9cac65659332581b19682a71349
https://git.kernel.org/stable/c/ad333578f736d56920e090d7db1f8dec891d815e
https://git.kernel.org/stable/c/4ca946b19caf655a08d5e2266d4d5526025ebb73
https://git.kernel.org/stable/c/d78d867dcea69c328db30df665be5be7d0148484
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