CVE-2024-26836: 
Linux Kernel vulnerability analysis and mitigation

CVE-2024-26836 is a vulnerability in the Linux kernel affecting the platform/x86 think-lmi driver. The issue relates to incorrect password opcode ordering for Lenovo workstations when the Admin password is enabled. The vulnerability was discovered and disclosed in April 2024 (Kernel Git).

The vulnerability exists in the think-lmi driver's password handling mechanism where the password opcode needs to be run before changing attribute values on Lenovo workstations when an Admin password is enabled. The issue was introduced in the original implementation where the password opcode was being set after the attribute value change, which could lead to authentication bypass in certain scenarios (Kernel Git).

The vulnerability affects Lenovo workstations using the Linux kernel's think-lmi driver when Admin password protection is enabled. The incorrect ordering of password opcode operations could potentially impact the security of BIOS settings modifications (Kernel Git).

The vulnerability requires local access to a system running the affected Linux kernel version with the think-lmi driver and Admin password protection enabled. The issue specifically affects Lenovo workstations, though testing confirmed that ThinkPads are not impacted by this vulnerability (Kernel Git).

The vulnerability has been patched in the Linux kernel through a fix that corrects the password opcode ordering. The fix ensures that the password opcode is run before the attribute value is changed when Admin password is enabled. The patch has been backported to various stable kernel versions (Kernel Git).