CVE-2024-46820: 
Linux Kernel vulnerability analysis and mitigation

CVE-2024-46820 affects the Linux kernel's AMD GPU driver (AMDGPU), specifically related to the VCN (Video Core Next) component. The vulnerability was discovered and disclosed on September 27, 2024, affecting Linux kernel versions from 6.10 up to (excluding) 6.10.9. The issue involves improper handling of IRQ (Interrupt Request) disabling in VCN 5 suspend operations (Kernel Patch).

The vulnerability stems from unnecessary IRQ handling in the VCN 5.0.0 implementation. The issue occurs because the code attempts to disable VCN IRQ and set states during suspend operations, despite not directly enabling/disabling VCN IRQ in VCN 5.0.0 or handling the IRQ state. This results in a warning message "WARNON(!amdgpuirqenabled(adev, src, type))" in the amdgpuirq_put() function. The vulnerability has been assigned a CVSS v3.1 base score of 7.8 (HIGH) with the vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (NVD).

The vulnerability has a high severity rating with potential impacts on confidentiality, integrity, and availability of the affected systems. The CVSS score of 7.8 indicates that successful exploitation could lead to significant consequences, though local access is required (NVD).

The vulnerability has been patched by removing the unnecessary IRQ disabling code in the VCN 5 suspend operation. The fix involves removing calls to disable IRQ and set state in the affected component. Users should upgrade to Linux kernel version 6.10.9 or later which contains the fix (Kernel Patch).