| From bippy-1.1.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2022-49866: net: wwan: mhi: fix memory leak in mhi_mbim_dellink |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: wwan: mhi: fix memory leak in mhi_mbim_dellink |
| |
| MHI driver registers network device without setting the |
| needs_free_netdev flag, and does NOT call free_netdev() when |
| unregisters network device, which causes a memory leak. |
| |
| This patch sets needs_free_netdev to true when registers |
| network device, which makes netdev subsystem call free_netdev() |
| automatically after unregister_netdevice(). |
| |
| The Linux kernel CVE team has assigned CVE-2022-49866 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit aa730a9905b7b079ef2fffdab7f15dbb842f5c7c and fixed in 5.15.79 with commit 2845bc9070cef0c651987487d84d4813d64675dd |
| Issue introduced in 5.15 with commit aa730a9905b7b079ef2fffdab7f15dbb842f5c7c and fixed in 6.0.9 with commit 3cd3ffe952f78ec5dadf300cb58d4b38a0c0106d |
| Issue introduced in 5.15 with commit aa730a9905b7b079ef2fffdab7f15dbb842f5c7c and fixed in 6.1 with commit 668205b9c9f94d5ed6ab00cce9a46a654c2b5d16 |
| |
| 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-2022-49866 |
| 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/wwan/mhi_wwan_mbim.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/2845bc9070cef0c651987487d84d4813d64675dd |
| https://git.kernel.org/stable/c/3cd3ffe952f78ec5dadf300cb58d4b38a0c0106d |
| https://git.kernel.org/stable/c/668205b9c9f94d5ed6ab00cce9a46a654c2b5d16 |
