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Amazon Linux AMI: CVE-2024-27020: Security patch for kernel (ALAS-2024-1942)

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Amazon Linux AMI: CVE-2024-27020: Security patch for kernel (ALAS-2024-1942)

Severity
7
CVSS
(AV:L/AC:M/Au:S/C:C/I:C/A:C)
Published
05/01/2024
Created
08/03/2024
Added
08/01/2024
Modified
01/28/2025

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.

Solution(s)

  • amazon-linux-upgrade-kernel

References

  • ALAS-2024-1942
  • CVE-2024-27020
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