发布于3月6日3月6日 Members Red Hat: CVE-2023-52864: kernel: platform/x86: wmi: Fix opening of char device (Multiple Advisories) Severity 4 CVSS (AV:L/AC:L/Au:M/C:N/I:N/A:C) Published 05/21/2024 Created 08/13/2024 Added 08/12/2024 Modified 12/05/2024 Description In the Linux kernel, the following vulnerability has been resolved: platform/x86: wmi: Fix opening of char device Since commit fa1f68db6ca7 ("drivers: misc: pass miscdevice pointer via file private data"), the miscdevice stores a pointer to itself inside filp->private_data, which means that private_data will not be NULL when wmi_char_open() is called. This might cause memory corruption should wmi_char_open() be unable to find its driver, something which can happen when the associated WMI device is deleted in wmi_free_devices(). Fix the problem by using the miscdevice pointer to retrieve the WMI device data associated with a char device using container_of(). This also avoids wmi_char_open() picking a wrong WMI device bound to a driver with the same name as the original driver. Solution(s) redhat-upgrade-kernel redhat-upgrade-kernel-rt References CVE-2023-52864 RHSA-2024:5101 RHSA-2024:5102 RHSA-2024:5363 RHSA-2024:5364 RHSA-2024:5365 RHSA-2024:6993 View more
