CVE-2024-27020: netfilter: nf_tables: Fix potential data-race in __nft_expr_type_get()
First published: Wed May 01 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=3.13<4.19.313 | |
| Linux Linux kernel | >=4.20<5.4.275 | |
| Linux Linux kernel | >=5.5<5.10.216 | |
| Linux Linux kernel | >=5.11<5.15.157 | |
| Linux Linux kernel | >=5.16<6.1.88 | |
| Linux Linux kernel | >=6.2<6.6.29 | |
| Linux Linux kernel | >=6.7<6.8.8 | |
| Linux Linux kernel | =6.9-rc1 | |
| Linux Linux kernel | =6.9-rc2 | |
| Linux Linux kernel | =6.9-rc3 | |
| Linux Linux kernel | =6.9-rc4 | |
| redhat/kernel | <5.15.157 | 5.15.157 |
| redhat/kernel | <6.1.88 | 6.1.88 |
| redhat/kernel | <6.6.29 | 6.6.29 |
| redhat/kernel | <6.8.8 | 6.8.8 |
| redhat/kernel | <6.9 | 6.9 |
| debian/linux | 5.10.223-1 6.1.106-3 6.1.99-1 6.10.6-1 6.10.9-1 |
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Reference Links
- 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://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- https://launchpad.net/bugs/cve/CVE-2024-27020
- https://access.redhat.com/security/cve/CVE-2024-27020
- https://lore.kernel.org/linux-cve-announce/2024050150-CVE-2024-27020-5158@gregkh/T
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2278257
- https://access.redhat.com/errata/RHSA-2024:4823
- https://access.redhat.com/errata/RHSA-2024:4831
- https://access.redhat.com/errata/RHSA-2024:5102
- https://access.redhat.com/errata/RHSA-2024:5101
- https://access.redhat.com/errata/RHSA-2024:5928
- https://bugzilla.redhat.com/show_bug.cgi?id=2278256
- https://git.kernel.org/linus/f969eb84ce482331a991079ab7a5c4dc3b7f89bf
- https://security-tracker.debian.org/tracker/CVE-2024-27020
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-27020
- https://nvd.nist.gov/vuln/detail/CVE-2024-27020
- https://ubuntu.com/security/CVE-2024-27020
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