CVE-2023-52817 in Linux
Zusammenfassung
von VulDB • 01.06.2026
Based on the kernel log snippet provided, here is an analysis of the crash:
### 1. **Type of Crash** This is a **Kernel Oops/Panic**, specifically a **Null Pointer Dereference** or **Invalid Memory Access**. - **`CR2: 0000000000000000`**: This is the most critical piece of information. `CR2` holds the linear address that caused the page fault. A value of `0x0` means the CPU tried to access memory address **0**, which is the null pointer. This confirms a **null pointer dereference**.
### 2. **Faulting Instruction** - **`RIP: 0033:0x7f5e07672992`**: The instruction pointer was at `0x7f5e07672992` when the crash occurred. - The `Code:` dump shows the assembly instructions around the fault. The fault likely occurred during a function call or memory access within this code block.
### 3. **Context & Modules** The `Modules linked in:` list shows the kernel modules active at the time of the crash. Key modules include: - **`amdgpu(OE)`**: AMD GPU driver (Out-of-tree, likely from AMD's official repository or a custom build). - **`igb`**: Intel Gigabit Ethernet driver. - **`ahci`**, **`xhci_pci`**: Storage and USB controllers. - **`kvm_amd`**, **`kvm`**: AMD Virtualization support. - **`nf_tables`**, **`ip_tables`**: Networking/firewall modules.
The `(OE)` next to `amdgpu` indicates it is an **Out-of-Tree** module, meaning it was not part of the mainline Linux kernel source but was compiled separately (common for AMD GPU drivers on older kernels or specific distributions).
### 4. **Likely Cause** Given the presence of `amdgpu(OE)` and the null pointer dereference, the most probable cause is: - **A bug in the AMD GPU driver (`amdgpu`)**: The driver attempted to access a pointer that was not initialized or had been freed. - **Hardware/Driver Interaction Issue**: A race condition or error in handling GPU commands, memory management, or interrupt handling.
### 5. **Recommended Actions** 1. **Check Full Logs**: - Look for more context before and after this Oops in `/var/log/kern.log`, `/var/log/syslog`, or `dmesg`. - Search for messages like `BUG: unable to handle kernel NULL pointer dereference` or `Call Trace` to identify the exact function that failed.
2. **Update Drivers/Kernel**: - If you are using an older kernel, consider updating to a newer version where `amdgpu` bugs may have been fixed. - Ensure you are using the latest stable version of the `amdgpu` driver.
3. **Test Hardware**: - Run `memtest86+` to rule out RAM issues. - Check GPU temperatures and stability under load.
4. **Disable Out-of-Tree Modules (if possible)**: - If the crash is reproducible and critical, try booting with the open-source `amdgpu` driver from the mainline kernel (if available) or disable the GPU temporarily to see if the system stabilizes.
5. **Report the Bug**: - If this is a recent kernel, report the issue to the Linux kernel mailing list or your distribution's bug tracker, including the full `dmesg` output and kernel version.
### Summary The system crashed due to a **null pointer dereference** (`CR2=0x0`) likely caused by a bug in the **AMD GPU driver (`amdgpu`)**. Update your kernel/driver or check for known issues with your specific GPU model and kernel version.
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