| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-27020: netfilter: nf_tables: Fix potential data-race in __nft_expr_type_get() |
| |
| 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. |
| |
| The Linux kernel CVE team has assigned CVE-2024-27020 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.13 with commit ef1f7df9170dbd875ce198ba84e6ab80f6fc139e and fixed in 4.19.313 with commit 939109c0a8e2a006a6cc8209e262d25065f4403a |
| Issue introduced in 3.13 with commit ef1f7df9170dbd875ce198ba84e6ab80f6fc139e and fixed in 5.4.275 with commit b38a133d37fa421c8447b383d788c9cc6f5cb34c |
| Issue introduced in 3.13 with commit ef1f7df9170dbd875ce198ba84e6ab80f6fc139e and fixed in 5.10.216 with commit 934e66e231cff2b18faa2c8aad0b8cec13957e05 |
| Issue introduced in 3.13 with commit ef1f7df9170dbd875ce198ba84e6ab80f6fc139e and fixed in 5.15.157 with commit 0b6de00206adbbfc6373b3ae38d2a6f197987907 |
| Issue introduced in 3.13 with commit ef1f7df9170dbd875ce198ba84e6ab80f6fc139e and fixed in 6.1.88 with commit 8d56bad42ac4c43c6c72ddd6a654a2628bf839c5 |
| Issue introduced in 3.13 with commit ef1f7df9170dbd875ce198ba84e6ab80f6fc139e and fixed in 6.6.29 with commit a9ebf340d123ae12582210407f879d6a5a1bc25b |
| Issue introduced in 3.13 with commit ef1f7df9170dbd875ce198ba84e6ab80f6fc139e and fixed in 6.8.8 with commit 01f1a678b05ade4b1248019c2dcca773aebbeb7f |
| Issue introduced in 3.13 with commit ef1f7df9170dbd875ce198ba84e6ab80f6fc139e and fixed in 6.9 with commit f969eb84ce482331a991079ab7a5c4dc3b7f89bf |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2024-27020 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| net/netfilter/nf_tables_api.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| 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 |
