| 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-2021-47525: serial: liteuart: fix use-after-free and memleak on unbind |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| serial: liteuart: fix use-after-free and memleak on unbind |
| |
| Deregister the port when unbinding the driver to prevent it from being |
| used after releasing the driver data and leaking memory allocated by |
| serial core. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47525 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.11 with commit 1da81e5562fac8286567422cc56a7fbd0dc646d4 and fixed in 5.15.7 with commit 602824cf9aa9db8830ffe5cfb2cd54365cada4fe |
| Issue introduced in 5.11 with commit 1da81e5562fac8286567422cc56a7fbd0dc646d4 and fixed in 5.16 with commit 05f929b395dec8957b636ff14e66b277ed022ed9 |
| |
| 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-2021-47525 |
| 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/tty/serial/liteuart.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/602824cf9aa9db8830ffe5cfb2cd54365cada4fe |
| https://git.kernel.org/stable/c/05f929b395dec8957b636ff14e66b277ed022ed9 |
