CVE-2024-49874
i3c: master: svc: Fix use after free vulnerability in svc_i3c_master Driver Due to Race Condition
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i3c: master: svc: Fix use after free vulnerability in svc_i3c_master Driver Due to Race Condition
In the Linux kernel, the following vulnerability has been resolved: i3c: master: svc: Fix use after free vulnerability in svc_i3c_master Driver Due to Race Condition In the svc_i3c_master_probe function, &master->hj_work is bound with svc_i3c_master_hj_work, &master->ibi_work is bound with svc_i3c_master_ibi_work. And svc_i3c_master_ibi_work can start the hj_work, svc_i3c_master_irq_handler can start the ibi_work. If we remove the module which will call svc_i3c_master_remove to make cleanup, it will free master->base through i3c_master_unregister while the work mentioned above will be used. The sequence of operations that may lead to a UAF bug is as follows: CPU0 CPU1 | svc_i3c_master_hj_work svc_i3c_master_remove | i3c_master_unregister(&master->base)| device_unregister(&master->dev) | device_release | //free master->base | | i3c_master_do_daa(&master->base) | //use master->base Fix it by ensuring that the work is canceled before proceeding with the cleanup in svc_i3c_master_remove.
Reserved 2024-10-21 | Published 2024-10-21 | Updated 2024-12-19 | Assigner Linuxgit.kernel.org/...c/56bddf543d4d7ddeff3f87b554ddacfdf086bffe
git.kernel.org/...c/4ac637122930cc4ab7e2c22e364cf3aaf96b05b1
git.kernel.org/...c/4318998892bf8fe99f97bea18c37ae7b685af75a
git.kernel.org/...c/27b55724d3f781dd6e635e89dc6e2fd78fa81a00
git.kernel.org/...c/61850725779709369c7e907ae8c7c75dc7cec4f3
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