cve/2024/CVE-2024-27020.md

### [CVE-2024-27020](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-27020)
![](https://img.shields.io/static/v1?label=Product&message=Linux&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=ef1f7df9170d%3C%20939109c0a8e2%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

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_expressionslist in __nft_expr_type_get(). Therefore, there is potential data-raceof nf_tables_expressions list entry.Use list_for_each_entry_rcu() to iterate over nf_tables_expressionslist in __nft_expr_type_get(), and use rcu_read_lock() in the callernft_expr_type_get() to protect the entire type query process.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/fkie-cad/nvd-json-data-feeds