| 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-2021-47101: asix: fix uninit-value in asix_mdio_read() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| asix: fix uninit-value in asix_mdio_read() |
| |
| asix_read_cmd() may read less than sizeof(smsr) bytes and in this case |
| smsr will be uninitialized. |
| |
| Fail log: |
| BUG: KMSAN: uninit-value in asix_check_host_enable drivers/net/usb/asix_common.c:82 [inline] |
| BUG: KMSAN: uninit-value in asix_check_host_enable drivers/net/usb/asix_common.c:82 [inline] drivers/net/usb/asix_common.c:497 |
| BUG: KMSAN: uninit-value in asix_mdio_read+0x3c1/0xb00 drivers/net/usb/asix_common.c:497 drivers/net/usb/asix_common.c:497 |
| asix_check_host_enable drivers/net/usb/asix_common.c:82 [inline] |
| asix_check_host_enable drivers/net/usb/asix_common.c:82 [inline] drivers/net/usb/asix_common.c:497 |
| asix_mdio_read+0x3c1/0xb00 drivers/net/usb/asix_common.c:497 drivers/net/usb/asix_common.c:497 |
| |
| The Linux kernel CVE team has assigned CVE-2021-47101 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.9 with commit d9fe64e511144c1ee7d7555b4111f09dde9692ef and fixed in 5.15.12 with commit d259f621c85949f30cc578cac813b82bb5169f56 |
| Issue introduced in 4.9 with commit d9fe64e511144c1ee7d7555b4111f09dde9692ef and fixed in 5.16 with commit 8035b1a2a37a29d8c717ef84fca8fe7278bc9f03 |
| |
| 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-2021-47101 |
| 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/usb/asix_common.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/d259f621c85949f30cc578cac813b82bb5169f56 |
| https://git.kernel.org/stable/c/8035b1a2a37a29d8c717ef84fca8fe7278bc9f03 |
