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Red Hat: CVE-2024-27019: kernel: netfilter: nf_tables: Fix potential data-race in __nft_obj_type_get() (Multiple Advisories)

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Red Hat: CVE-2024-27019: kernel: netfilter: nf_tables: Fix potential data-race in __nft_obj_type_get() (Multiple Advisories)

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
05/01/2024
Created
07/26/2024
Added
07/25/2024
Modified
12/05/2024

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.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

References

  • CVE-2024-27019
  • RHSA-2024:4823
  • RHSA-2024:4831
  • RHSA-2024:5101
  • RHSA-2024:5102
  • RHSA-2024:5928
  • RHSA-2024:6993
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