| 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-2024-40921: net: bridge: mst: pass vlan group directly to br_mst_vlan_set_state |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: bridge: mst: pass vlan group directly to br_mst_vlan_set_state |
| |
| Pass the already obtained vlan group pointer to br_mst_vlan_set_state() |
| instead of dereferencing it again. Each caller has already correctly |
| dereferenced it for their context. This change is required for the |
| following suspicious RCU dereference fix. No functional changes |
| intended. |
| |
| The Linux kernel CVE team has assigned CVE-2024-40921 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.1.93 with commit 8ca9a750fc711911ef616ceb627d07357b04545e and fixed in 6.1.95 with commit 09f4337c27f5bdeb8646a6db91488cc2f7d537ff |
| Issue introduced in 6.6.33 with commit 4488617e5e995a09abe4d81add5fb165674edb59 and fixed in 6.6.35 with commit a6cc9e9a651b9861efa068c164ee62dfba68c6ca |
| Issue introduced in 6.9.3 with commit e43dd2b1ec746e105b7db5f9ad6ef14685a615a4 and fixed in 6.9.6 with commit d2dc02775fc0c4eacaee833a0637e5958884a8e5 |
| Issue introduced in 6.8.12 with commit a2b01e65d9ba8af2bb086d3b7288ca53a07249ac |
| |
| 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-2024-40921 |
| 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/bridge/br_mst.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/09f4337c27f5bdeb8646a6db91488cc2f7d537ff |
| https://git.kernel.org/stable/c/a6cc9e9a651b9861efa068c164ee62dfba68c6ca |
| https://git.kernel.org/stable/c/d2dc02775fc0c4eacaee833a0637e5958884a8e5 |
| https://git.kernel.org/stable/c/36c92936e868601fa1f43da6758cf55805043509 |
