CVE-2024-49874

Technical Description

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 |

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected Products

References