| 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-2024-27390: ipv6: mcast: remove one synchronize_net() barrier in ipv6_mc_down() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ipv6: mcast: remove one synchronize_net() barrier in ipv6_mc_down() |
| |
| As discussed in the past (commit 2d3916f31891 ("ipv6: fix skb drops |
| in igmp6_event_query() and igmp6_event_report()")) I think the |
| synchronize_net() call in ipv6_mc_down() is not needed. |
| |
| Under load, synchronize_net() can last between 200 usec and 5 ms. |
| |
| KASAN seems to agree as well. |
| |
| The Linux kernel CVE team has assigned CVE-2024-27390 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.13 with commit f185de28d9ae6c978135993769352e523ee8df06 and fixed in 5.15.153 with commit 9d159d6637ccce25f879d662a480541ef4ba3a50 |
| Issue introduced in 5.13 with commit f185de28d9ae6c978135993769352e523ee8df06 and fixed in 6.1.83 with commit a03ede2282ebbd181bd6f5c38cbfcb5765afcd04 |
| Issue introduced in 5.13 with commit f185de28d9ae6c978135993769352e523ee8df06 and fixed in 6.6.23 with commit 26d4bac55750d535f1f0b8790dc26daf6089e373 |
| Issue introduced in 5.13 with commit f185de28d9ae6c978135993769352e523ee8df06 and fixed in 6.7.11 with commit 7eb06ee5921189812e6b4bfe7b0f1e878be16df7 |
| Issue introduced in 5.13 with commit f185de28d9ae6c978135993769352e523ee8df06 and fixed in 6.8.2 with commit 5da9a218340a2bc804dc4327e5804392e24a0b88 |
| Issue introduced in 5.13 with commit f185de28d9ae6c978135993769352e523ee8df06 and fixed in 6.9 with commit 17ef8efc00b34918b966388b2af0993811895a8c |
| |
| 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-2024-27390 |
| 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/ipv6/mcast.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/9d159d6637ccce25f879d662a480541ef4ba3a50 |
| https://git.kernel.org/stable/c/a03ede2282ebbd181bd6f5c38cbfcb5765afcd04 |
| https://git.kernel.org/stable/c/26d4bac55750d535f1f0b8790dc26daf6089e373 |
| https://git.kernel.org/stable/c/7eb06ee5921189812e6b4bfe7b0f1e878be16df7 |
| https://git.kernel.org/stable/c/5da9a218340a2bc804dc4327e5804392e24a0b88 |
| https://git.kernel.org/stable/c/17ef8efc00b34918b966388b2af0993811895a8c |
