| 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-2022-48873: misc: fastrpc: Don't remove map on creater_process and device_release |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| misc: fastrpc: Don't remove map on creater_process and device_release |
| |
| Do not remove the map from the list on error path in |
| fastrpc_init_create_process, instead call fastrpc_map_put, to avoid |
| use-after-free. Do not remove it on fastrpc_device_release either, |
| call fastrpc_map_put instead. |
| |
| The fastrpc_free_map is the only proper place to remove the map. |
| This is called only after the reference count is 0. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48873 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.2 with commit b49f6d83e290f17e20f4e5cf31288d3bb4955ea6 and fixed in 5.4.230 with commit 4b5c44e924a571d0ad07054de549624fbc04e4d7 |
| Issue introduced in 5.2 with commit b49f6d83e290f17e20f4e5cf31288d3bb4955ea6 and fixed in 5.10.165 with commit 193cd853145b63e670bd73740250983af1475330 |
| Issue introduced in 5.2 with commit b49f6d83e290f17e20f4e5cf31288d3bb4955ea6 and fixed in 5.15.90 with commit 1b7b7bb400dd13dcb03fc6e591bb7ca4664bbec8 |
| Issue introduced in 5.2 with commit b49f6d83e290f17e20f4e5cf31288d3bb4955ea6 and fixed in 6.1.8 with commit 35ddd482345c43d9eec1f3406c0f20a95ed4054b |
| Issue introduced in 5.2 with commit b49f6d83e290f17e20f4e5cf31288d3bb4955ea6 and fixed in 6.2 with commit 5bb96c8f9268e2fdb0e5321cbc358ee5941efc15 |
| Issue introduced in 5.1.6 with commit aaf5aa44934ad069cac805923c49f6968b9a0d49 |
| |
| 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-2022-48873 |
| 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/misc/fastrpc.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/4b5c44e924a571d0ad07054de549624fbc04e4d7 |
| https://git.kernel.org/stable/c/193cd853145b63e670bd73740250983af1475330 |
| https://git.kernel.org/stable/c/1b7b7bb400dd13dcb03fc6e591bb7ca4664bbec8 |
| https://git.kernel.org/stable/c/35ddd482345c43d9eec1f3406c0f20a95ed4054b |
| https://git.kernel.org/stable/c/5bb96c8f9268e2fdb0e5321cbc358ee5941efc15 |
