| 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-2023-52584: spmi: mediatek: Fix UAF on device remove |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| spmi: mediatek: Fix UAF on device remove |
| |
| The pmif driver data that contains the clocks is allocated along with |
| spmi_controller. |
| On device remove, spmi_controller will be freed first, and then devres |
| , including the clocks, will be cleanup. |
| This leads to UAF because putting the clocks will access the clocks in |
| the pmif driver data, which is already freed along with spmi_controller. |
| |
| This can be reproduced by enabling DEBUG_TEST_DRIVER_REMOVE and |
| building the kernel with KASAN. |
| |
| Fix the UAF issue by using unmanaged clk_bulk_get() and putting the |
| clocks before freeing spmi_controller. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52584 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 6.1.77 with commit 521f28eedd6b14228c46e3b81e3bf9b90c2818d8 |
| Fixed in 6.6.16 with commit f8dcafcb54632536684336161da8bdd52120f95e |
| Fixed in 6.7.4 with commit 9a3881b1f07db1bb55cb0108e6f05cfd027eaf2e |
| Fixed in 6.8 with commit e821d50ab5b956ed0effa49faaf29912fd4106d9 |
| |
| 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-2023-52584 |
| 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/spmi/spmi-mtk-pmif.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/521f28eedd6b14228c46e3b81e3bf9b90c2818d8 |
| https://git.kernel.org/stable/c/f8dcafcb54632536684336161da8bdd52120f95e |
| https://git.kernel.org/stable/c/9a3881b1f07db1bb55cb0108e6f05cfd027eaf2e |
| https://git.kernel.org/stable/c/e821d50ab5b956ed0effa49faaf29912fd4106d9 |
