CVE-2024-27411

What it actually does

Use-after-free in the Nouveau DRM driver where DMA buffers required for GPU suspend/resume are deallocated after initialization instead of at driver unload, causing invalid memory access during power management on multi-GPU systems.

Why it matters to the business

Leads to kernel module errors and complete system rendering freezes on multi-GPU Linux setups, disrupting user sessions and requiring reboots; widespread impact on Linux kernel deployments with discrete Nvidia GPUs.

How an attack unfolds

Normal system power management or scripted suspend/resume cycles after Nouveau initialization trigger access to already-freed DMA buffers, resulting in driver failure and freeze; no remote code execution path identified.

How to fix it

Upgrade Linux kernel to version 6.7.9 or apply commit be00e15b240ed71fc30c0576af7ab670c8271661; ensure fixed packages are deployed across all affected stable trees.

How to confirm the fix worked

Confirm running kernel version meets or exceeds 6.7.9, then test suspend/resume cycles on multi-GPU hardware while monitoring Nouveau logs for absence of errors.

Typical attack path

1. Load Nouveau driver on multi-GPU Linux system
2. Complete GPU initialization causing premature buffer deallocation
3. Initiate suspend or resume operation
4. Access freed DMA buffers triggering kernel errors and freeze

How to detect it

Review kernel logs for Nouveau driver errors during suspend/resume events or unexpected rendering freezes on multi-GPU configurations; correlate with power management activity.

What your security team should do

• Apply kernel updates immediately on multi-GPU systems to prevent freezes
• Prioritize testing of graphics suspend/resume functionality after patching
• Monitor kernel logs for Nouveau-related errors during power events