CVE-2023-52657: 
Linux Kernel vulnerability analysis and mitigation

CVE-2023-52657 affects the Linux kernel's AMD graphics driver. The vulnerability was discovered when a previous fix for a reboot exception in the SI Oland graphics card caused system hangs when Display Core (DC) was enabled and errors during driver reboot and power off cycles (Kernel Git). The issue was resolved by reverting commit e490d60a2f76bff636c68ce4fe34c1b6c34bbd86.

The vulnerability is related to the AMD graphics driver's power management functionality in the Linux kernel, specifically affecting the SI (Southern Islands) series graphics cards when using the Display Core feature. The issue manifests in the legacy DPM (Dynamic Power Management) code for SI devices, particularly in the temperature range setting functionality (Kernel Git). Red Hat has assigned this vulnerability a CVSS v3 base score of 5.5 with vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H (Red Hat).

The vulnerability can cause system hangs when Display Core (DC) is enabled on affected AMD SI series graphics cards. Additionally, it can lead to errors during driver reboot and power off cycles, potentially affecting system stability and normal operation (Kernel Git).

The vulnerability requires local access and low privileges to exploit. It primarily affects systems running AMD SI series graphics cards with Display Core enabled (Red Hat).

The issue has been addressed by reverting the problematic commit (e490d60a2f76bff636c68ce4fe34c1b6c34bbd86) in the Linux kernel. Users should update to kernel versions that include this reversion to resolve the vulnerability (Kernel Git).