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THREATINT
PUBLISHED

CVE-2024-27020

netfilter: nf_tables: Fix potential data-race in __nft_expr_type_get()

Reserved:2024-02-19
Published:2024-05-01
Updated:2024-05-13

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.

Product status

Default status
unaffected

ef1f7df9170d before 939109c0a8e2
affected

ef1f7df9170d before b38a133d37fa
affected

ef1f7df9170d before 934e66e231cf
affected

ef1f7df9170d before 0b6de00206ad
affected

ef1f7df9170d before 8d56bad42ac4
affected

ef1f7df9170d before a9ebf340d123
affected

ef1f7df9170d before 01f1a678b05a
affected

ef1f7df9170d before f969eb84ce48
affected

Default status
affected

3.13
affected

Any version before 3.13
unaffected

4.19.313
unaffected

5.4.275
unaffected

5.10.216
unaffected

5.15.157
unaffected

6.1.88
unaffected

6.6.29
unaffected

6.8.8
unaffected

6.9
unaffected

References

https://git.kernel.org/stable/c/939109c0a8e2a006a6cc8209e262d25065f4403a

https://git.kernel.org/stable/c/b38a133d37fa421c8447b383d788c9cc6f5cb34c

https://git.kernel.org/stable/c/934e66e231cff2b18faa2c8aad0b8cec13957e05

https://git.kernel.org/stable/c/0b6de00206adbbfc6373b3ae38d2a6f197987907

https://git.kernel.org/stable/c/8d56bad42ac4c43c6c72ddd6a654a2628bf839c5

https://git.kernel.org/stable/c/a9ebf340d123ae12582210407f879d6a5a1bc25b

https://git.kernel.org/stable/c/01f1a678b05ade4b1248019c2dcca773aebbeb7f

https://git.kernel.org/stable/c/f969eb84ce482331a991079ab7a5c4dc3b7f89bf

cve.org CVE-2024-27020

nvd.nist.gov CVE-2024-27020

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