| 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-2021-47070: uio_hv_generic: Fix another memory leak in error handling paths |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| uio_hv_generic: Fix another memory leak in error handling paths |
| |
| Memory allocated by 'vmbus_alloc_ring()' at the beginning of the probe |
| function is never freed in the error handling path. |
| |
| Add the missing 'vmbus_free_ring()' call. |
| |
| Note that it is already freed in the .remove function. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47070 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.20 with commit cdfa835c6e5e87d145f9f632b58843de97509f2b and fixed in 5.12.7 with commit 5f59240cf25b2f7a0fdffc2701482a70310fec07 |
| Issue introduced in 4.20 with commit cdfa835c6e5e87d145f9f632b58843de97509f2b and fixed in 5.13 with commit 0b0226be3a52dadd965644bc52a807961c2c26df |
| |
| 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-2021-47070 |
| 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/uio/uio_hv_generic.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/5f59240cf25b2f7a0fdffc2701482a70310fec07 |
| https://git.kernel.org/stable/c/0b0226be3a52dadd965644bc52a807961c2c26df |
