| 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-2022-48663: gpio: mockup: fix NULL pointer dereference when removing debugfs |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| gpio: mockup: fix NULL pointer dereference when removing debugfs |
| |
| We now remove the device's debugfs entries when unbinding the driver. |
| This now causes a NULL-pointer dereference on module exit because the |
| platform devices are unregistered *after* the global debugfs directory |
| has been recursively removed. Fix it by unregistering the devices first. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48663 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.10.144 with commit 3815e66c2183f3430490e450ba16779cf5214ec6 and fixed in 5.10.146 with commit bdea98b98f844bd8a983ca880893e509a8b4162f |
| Issue introduced in 5.15.69 with commit 3a10e8edee2b45a654f1f7b05f747129ec84cf9d and fixed in 5.15.71 with commit 18352095a0d581f6aeb1e9fc9d68cc0152cd64b4 |
| Issue introduced in 5.19.10 with commit bc55c1677edbe86a1c66a35e800df47dff16ad61 and fixed in 5.19.12 with commit af0bfabf06c74c260265c30ba81a34e7dec0e881 |
| |
| 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-2022-48663 |
| 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/gpio/gpio-mockup.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/bdea98b98f844bd8a983ca880893e509a8b4162f |
| https://git.kernel.org/stable/c/18352095a0d581f6aeb1e9fc9d68cc0152cd64b4 |
| https://git.kernel.org/stable/c/af0bfabf06c74c260265c30ba81a34e7dec0e881 |
| https://git.kernel.org/stable/c/b7df41a6f79dfb18ba2203f8c5f0e9c0b9b57f68 |
