| 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-2024-26723: lan966x: Fix crash when adding interface under a lag |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| lan966x: Fix crash when adding interface under a lag |
| |
| There is a crash when adding one of the lan966x interfaces under a lag |
| interface. The issue can be reproduced like this: |
| ip link add name bond0 type bond miimon 100 mode balance-xor |
| ip link set dev eth0 master bond0 |
| |
| The reason is because when adding a interface under the lag it would go |
| through all the ports and try to figure out which other ports are under |
| that lag interface. And the issue is that lan966x can have ports that are |
| NULL pointer as they are not probed. So then iterating over these ports |
| it would just crash as they are NULL pointers. |
| The fix consists in actually checking for NULL pointers before accessing |
| something from the ports. Like we do in other places. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26723 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.1 with commit cabc9d49333df72fe0f6d58bdcf9057ba341e701 and fixed in 6.1.79 with commit b9357489c46c7a43999964628db8b47d3a1f8672 |
| Issue introduced in 6.1 with commit cabc9d49333df72fe0f6d58bdcf9057ba341e701 and fixed in 6.6.18 with commit 48fae67d837488c87379f0c9f27df7391718477c |
| Issue introduced in 6.1 with commit cabc9d49333df72fe0f6d58bdcf9057ba341e701 and fixed in 6.7.6 with commit 2a492f01228b7d091dfe38974ef40dccf8f9f2f1 |
| Issue introduced in 6.1 with commit cabc9d49333df72fe0f6d58bdcf9057ba341e701 and fixed in 6.8 with commit 15faa1f67ab405d47789d4702f587ec7df7ef03e |
| |
| 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-2024-26723 |
| 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: |
| drivers/net/ethernet/microchip/lan966x/lan966x_lag.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/b9357489c46c7a43999964628db8b47d3a1f8672 |
| https://git.kernel.org/stable/c/48fae67d837488c87379f0c9f27df7391718477c |
| https://git.kernel.org/stable/c/2a492f01228b7d091dfe38974ef40dccf8f9f2f1 |
| https://git.kernel.org/stable/c/15faa1f67ab405d47789d4702f587ec7df7ef03e |
