CVE-2024-27020

HIGH
Published May 1, 2024 Modified May 12, 2026 CWE-362

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_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.

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CVSS v3.1 Score

7.0
HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-362 CWE-362

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/01f1a678b05ade4b1248019c2dcca773aebbeb7f https://git.kernel.org/stable/c/0b6de00206adbbfc6373b3ae38d2a6f197987907 https://git.kernel.org/stable/c/8d56bad42ac4c43c6c72ddd6a654a2628bf839c5 https://git.kernel.org/stable/c/934e66e231cff2b18faa2c8aad0b8cec13957e05 https://git.kernel.org/stable/c/939109c0a8e2a006a6cc8209e262d25065f4403a https://git.kernel.org/stable/c/a9ebf340d123ae12582210407f879d6a5a1bc25b https://git.kernel.org/stable/c/b38a133d37fa421c8447b383d788c9cc6f5cb34c https://git.kernel.org/stable/c/f969eb84ce482331a991079ab7a5c4dc3b7f89bf https://git.kernel.org/stable/c/01f1a678b05ade4b1248019c2dcca773aebbeb7f https://git.kernel.org/stable/c/0b6de00206adbbfc6373b3ae38d2a6f197987907 https://git.kernel.org/stable/c/8d56bad42ac4c43c6c72ddd6a654a2628bf839c5 https://git.kernel.org/stable/c/934e66e231cff2b18faa2c8aad0b8cec13957e05 https://git.kernel.org/stable/c/939109c0a8e2a006a6cc8209e262d25065f4403a https://git.kernel.org/stable/c/a9ebf340d123ae12582210407f879d6a5a1bc25b https://git.kernel.org/stable/c/b38a133d37fa421c8447b383d788c9cc6f5cb34c https://git.kernel.org/stable/c/f969eb84ce482331a991079ab7a5c4dc3b7f89bf

Frequently Asked Questions

What is CVE-2024-27020? +
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. It has a CVSS v3.1 base score of 7.0 (HIGH).
How severe is CVE-2024-27020? +
CVE-2024-27020 has a CVSS v3.1 score of 7.0 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2024-27020? +
CVE-2024-27020 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-27020? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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