| 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-2024-26866: spi: lpspi: Avoid potential use-after-free in probe() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| spi: lpspi: Avoid potential use-after-free in probe() |
| |
| fsl_lpspi_probe() is allocating/disposing memory manually with |
| spi_alloc_host()/spi_alloc_target(), but uses |
| devm_spi_register_controller(). In case of error after the latter call the |
| memory will be explicitly freed in the probe function by |
| spi_controller_put() call, but used afterwards by "devm" management outside |
| probe() (spi_unregister_controller() <- devm_spi_unregister() below). |
| |
| Unable to handle kernel NULL pointer dereference at virtual address 0000000000000070 |
| ... |
| Call trace: |
| kernfs_find_ns |
| kernfs_find_and_get_ns |
| sysfs_remove_group |
| sysfs_remove_groups |
| device_remove_attrs |
| device_del |
| spi_unregister_controller |
| devm_spi_unregister |
| release_nodes |
| devres_release_all |
| really_probe |
| driver_probe_device |
| __device_attach_driver |
| bus_for_each_drv |
| __device_attach |
| device_initial_probe |
| bus_probe_device |
| deferred_probe_work_func |
| process_one_work |
| worker_thread |
| kthread |
| ret_from_fork |
| |
| The Linux kernel CVE team has assigned CVE-2024-26866 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.10 with commit 5314987de5e5f5e38436ef4a69328bc472bbd63e and fixed in 6.6.23 with commit da83ed350e4604b976e94239b08d8e2e7eaee7ea |
| Issue introduced in 4.10 with commit 5314987de5e5f5e38436ef4a69328bc472bbd63e and fixed in 6.7.11 with commit 1543418e82789cc383cd36d41469983c64e3fc7f |
| Issue introduced in 4.10 with commit 5314987de5e5f5e38436ef4a69328bc472bbd63e and fixed in 6.8.2 with commit 996ce839606afd0fef91355627868022aa73eb68 |
| Issue introduced in 4.10 with commit 5314987de5e5f5e38436ef4a69328bc472bbd63e and fixed in 6.9 with commit 2ae0ab0143fcc06190713ed81a6486ed0ad3c861 |
| |
| 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-2024-26866 |
| 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/spi/spi-fsl-lpspi.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/da83ed350e4604b976e94239b08d8e2e7eaee7ea |
| https://git.kernel.org/stable/c/1543418e82789cc383cd36d41469983c64e3fc7f |
| https://git.kernel.org/stable/c/996ce839606afd0fef91355627868022aa73eb68 |
| https://git.kernel.org/stable/c/2ae0ab0143fcc06190713ed81a6486ed0ad3c861 |
