| 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-2021-47596: net: hns3: fix use-after-free bug in hclgevf_send_mbx_msg |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: hns3: fix use-after-free bug in hclgevf_send_mbx_msg |
| |
| Currently, the hns3_remove function firstly uninstall client instance, |
| and then uninstall acceletion engine device. The netdevice is freed in |
| client instance uninstall process, but acceletion engine device uninstall |
| process still use it to trace runtime information. This causes a use after |
| free problem. |
| |
| So fixes it by check the instance register state to avoid use after free. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47596 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.8 with commit d8355240cf8fb8b9e002b5c8458578435cea85c2 and fixed in 5.10.88 with commit 12512bc8f25b8ba9795dfbae0e9ca57ff13fd542 |
| Issue introduced in 5.8 with commit d8355240cf8fb8b9e002b5c8458578435cea85c2 and fixed in 5.15.11 with commit 4f4a353f6fe033807cd026a5de81c67469ff19b0 |
| Issue introduced in 5.8 with commit d8355240cf8fb8b9e002b5c8458578435cea85c2 and fixed in 5.16 with commit 27cbf64a766e86f068ce6214f04c00ceb4db1af4 |
| |
| 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-2021-47596 |
| 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/hisilicon/hns3/hns3vf/hclgevf_mbx.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/12512bc8f25b8ba9795dfbae0e9ca57ff13fd542 |
| https://git.kernel.org/stable/c/4f4a353f6fe033807cd026a5de81c67469ff19b0 |
| https://git.kernel.org/stable/c/27cbf64a766e86f068ce6214f04c00ceb4db1af4 |
