| 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-2021-47120: HID: magicmouse: fix NULL-deref on disconnect |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| HID: magicmouse: fix NULL-deref on disconnect |
| |
| Commit 9d7b18668956 ("HID: magicmouse: add support for Apple Magic |
| Trackpad 2") added a sanity check for an Apple trackpad but returned |
| success instead of -ENODEV when the check failed. This means that the |
| remove callback will dereference the never-initialised driver data |
| pointer when the driver is later unbound (e.g. on USB disconnect). |
| |
| The Linux kernel CVE team has assigned CVE-2021-47120 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.20 with commit 9d7b18668956c411a422d04c712994c5fdb23a4b and fixed in 5.4.125 with commit 368c5d45a87e1bcc7f1e98e0c255c37b7b12c5d6 |
| Issue introduced in 4.20 with commit 9d7b18668956c411a422d04c712994c5fdb23a4b and fixed in 5.10.43 with commit b5d013c4c76b276890135b5d32803c4c63924b77 |
| Issue introduced in 4.20 with commit 9d7b18668956c411a422d04c712994c5fdb23a4b and fixed in 5.12.10 with commit 9cf27473f21913a3eaf4702dd2a25415afd5f33f |
| Issue introduced in 4.20 with commit 9d7b18668956c411a422d04c712994c5fdb23a4b and fixed in 5.13 with commit 4b4f6cecca446abcb686c6e6c451d4f1ec1a7497 |
| |
| 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-2021-47120 |
| 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/hid/hid-magicmouse.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/368c5d45a87e1bcc7f1e98e0c255c37b7b12c5d6 |
| https://git.kernel.org/stable/c/b5d013c4c76b276890135b5d32803c4c63924b77 |
| https://git.kernel.org/stable/c/9cf27473f21913a3eaf4702dd2a25415afd5f33f |
| https://git.kernel.org/stable/c/4b4f6cecca446abcb686c6e6c451d4f1ec1a7497 |
