| 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-2024-40993: netfilter: ipset: Fix suspicious rcu_dereference_protected() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| netfilter: ipset: Fix suspicious rcu_dereference_protected() |
| |
| When destroying all sets, we are either in pernet exit phase or |
| are executing a "destroy all sets command" from userspace. The latter |
| was taken into account in ip_set_dereference() (nfnetlink mutex is held), |
| but the former was not. The patch adds the required check to |
| rcu_dereference_protected() in ip_set_dereference(). |
| |
| The Linux kernel CVE team has assigned CVE-2024-40993 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.1.95 with commit 390b353d1a1da3e9c6c0fd14fe650d69063c95d6 and fixed in 6.1.96 with commit 788d585e62f487bc4536d454937f737b70d39a33 |
| Issue introduced in 6.6.35 with commit 2ba35b37f780c6410bb4bba9c3072596d8576702 and fixed in 6.6.36 with commit 94dd411c18d7fff9e411555d5c662d29416501e4 |
| Issue introduced in 6.9.6 with commit 90ae20d47de602198eb69e6cd7a3db3420abfc08 and fixed in 6.9.7 with commit 3fc09e1ca854bc234e007a56e0f7431f5e2defb5 |
| |
| 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-2024-40993 |
| 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/ipset/ip_set_core.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/3799d02ae4208af08e81310770d8754863a246a1 |
| https://git.kernel.org/stable/c/72d9611968867cc4c5509e7708b1507d692b797a |
| https://git.kernel.org/stable/c/523bed6489e089dd8040e72453fb79da47b144c2 |
| https://git.kernel.org/stable/c/788d585e62f487bc4536d454937f737b70d39a33 |
| https://git.kernel.org/stable/c/94dd411c18d7fff9e411555d5c662d29416501e4 |
| https://git.kernel.org/stable/c/3fc09e1ca854bc234e007a56e0f7431f5e2defb5 |
| https://git.kernel.org/stable/c/8ecd06277a7664f4ef018abae3abd3451d64e7a6 |
