CVE-2024-27020
netfilter: nf_tables: Fix potential data-race in __nft_expr_type_get()
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netfilter: nf_tables: Fix potential data-race in __nft_expr_type_get()
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: Fix potential data-race in __nft_expr_type_get() nft_unregister_expr() can concurrent with __nft_expr_type_get(), and there is not any protection when iterate over nf_tables_expressions list in __nft_expr_type_get(). Therefore, there is potential data-race of nf_tables_expressions list entry. Use list_for_each_entry_rcu() to iterate over nf_tables_expressions list in __nft_expr_type_get(), and use rcu_read_lock() in the caller nft_expr_type_get() to protect the entire type query process.
Reserved 2024-02-19 | Published 2024-05-01 | Updated 2025-05-04 | Assigner Linuxgit.kernel.org/...c/939109c0a8e2a006a6cc8209e262d25065f4403a
git.kernel.org/...c/b38a133d37fa421c8447b383d788c9cc6f5cb34c
git.kernel.org/...c/934e66e231cff2b18faa2c8aad0b8cec13957e05
git.kernel.org/...c/0b6de00206adbbfc6373b3ae38d2a6f197987907
git.kernel.org/...c/8d56bad42ac4c43c6c72ddd6a654a2628bf839c5
git.kernel.org/...c/a9ebf340d123ae12582210407f879d6a5a1bc25b
git.kernel.org/...c/01f1a678b05ade4b1248019c2dcca773aebbeb7f
git.kernel.org/...c/f969eb84ce482331a991079ab7a5c4dc3b7f89bf
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