| 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-2024-26910: netfilter: ipset: fix performance regression in swap operation |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| netfilter: ipset: fix performance regression in swap operation |
| |
| The patch "netfilter: ipset: fix race condition between swap/destroy |
| and kernel side add/del/test", commit 28628fa9 fixes a race condition. |
| But the synchronize_rcu() added to the swap function unnecessarily slows |
| it down: it can safely be moved to destroy and use call_rcu() instead. |
| |
| Eric Dumazet pointed out that simply calling the destroy functions as |
| rcu callback does not work: sets with timeout use garbage collectors |
| which need cancelling at destroy which can wait. Therefore the destroy |
| functions are split into two: cancelling garbage collectors safely at |
| executing the command received by netlink and moving the remaining |
| part only into the rcu callback. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26910 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.4.264 with commit 427deb5ba5661c4ae1cfb35955d2e01bd5f3090a and fixed in 5.4.269 with commit c7f2733e5011bfd136f1ca93497394d43aa76225 |
| Issue introduced in 5.10.204 with commit e7152a138a5ac77439ff4e7a7533448a7d4c260d and fixed in 5.10.210 with commit a24d5f2ac8ef702a58e55ec276aad29b4bd97e05 |
| Issue introduced in 5.15.143 with commit 8bb930c3a1eacec1b14817f565ff81667c7c5dfa and fixed in 5.15.149 with commit c2dc077d8f722a1c73a24e674f925602ee5ece49 |
| Issue introduced in 6.1.68 with commit 875ee3a09e27b7adb7006ca6d16faf7f33415aa5 and fixed in 6.1.79 with commit 653bc5e6d9995d7d5f497c665b321875a626161c |
| Issue introduced in 6.6.7 with commit 23c31036f862582f98386120aee55c9ae23d7899 and fixed in 6.6.18 with commit b93a6756a01f4fd2f329a39216f9824c56a66397 |
| Issue introduced in 6.7 with commit 28628fa952fefc7f2072ce6e8016968cc452b1ba and fixed in 6.7.6 with commit 970709a67696b100a57b33af1a3d75fc34b747eb |
| Issue introduced in 6.7 with commit 28628fa952fefc7f2072ce6e8016968cc452b1ba and fixed in 6.8 with commit 97f7cf1cd80eeed3b7c808b7c12463295c751001 |
| Issue introduced in 4.19.302 with commit a12606e5ad0cee8f4ba3ec68561c4d6275d2df57 |
| |
| 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-2024-26910 |
| 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: |
| include/linux/netfilter/ipset/ip_set.h |
| net/netfilter/ipset/ip_set_bitmap_gen.h |
| net/netfilter/ipset/ip_set_core.c |
| net/netfilter/ipset/ip_set_hash_gen.h |
| net/netfilter/ipset/ip_set_list_set.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/c7f2733e5011bfd136f1ca93497394d43aa76225 |
| https://git.kernel.org/stable/c/a24d5f2ac8ef702a58e55ec276aad29b4bd97e05 |
| https://git.kernel.org/stable/c/c2dc077d8f722a1c73a24e674f925602ee5ece49 |
| https://git.kernel.org/stable/c/653bc5e6d9995d7d5f497c665b321875a626161c |
| https://git.kernel.org/stable/c/b93a6756a01f4fd2f329a39216f9824c56a66397 |
| https://git.kernel.org/stable/c/970709a67696b100a57b33af1a3d75fc34b747eb |
| https://git.kernel.org/stable/c/97f7cf1cd80eeed3b7c808b7c12463295c751001 |
