CVE-2025-21688 in Linux
الملخص
بحسب VulDB • 02/06/2026
Based on the kernel log snippet provided, here is an analysis of the issue:
### **Summary** You are experiencing a **kernel crash (Oops/Panic)** in the **V3D GPU driver** (`v3d`) on a **Raspberry Pi 5**. The crash occurs in the interrupt handler (`v3d_irq`) while the `chromium` browser was running.
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### **Key Details from the Log** 1. **Hardware**: Raspberry Pi 5 Model B Rev 1.0 2. **Kernel Version**: `6.13.0-v8+` (This is a very recent, likely mainline or near-mainline kernel) 3. **Process**: `chromium` (PID 2008) 4. **Faulting Function**: `v3d_irq+0x118/0x2e0 [v3d]`
- This is the interrupt service routine for the V3D GPU. 5. **Tainted**: `[C]=CRAP`
- The kernel is tainted because a proprietary or non-GPL module was loaded, or a crash occurred. In this context, it likely indicates a crash in a driver module.
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### **Likely Causes** 1. **Bug in the V3D Driver**: - The V3D driver for Raspberry Pi 5 is relatively new and may have bugs, especially under heavy GPU load (e.g., hardware-accelerated video playback, WebGL in Chromium). - The crash in `v3d_irq` suggests an issue with interrupt handling, possibly due to: - A race condition. - Hardware error (GPU hang). - Incorrect register access.
2. **Chromium GPU Acceleration Issue**: - Chromium uses the GPU for hardware acceleration. If the GPU driver crashes, Chromium may trigger it. - Try disabling GPU acceleration in Chromium to see if the crash stops.
3. **Kernel Bug**: - Since you’re on kernel `6.13.0`, this might be a regression or an unpatched bug. Check if there are known issues with V3D on this kernel version.
4. **Hardware Issue** (Less Likely): - While possible, GPU hardware failures are rare. This is more likely a software/driver issue.
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### **Troubleshooting Steps**
#### **1. Disable GPU Acceleration in Chromium** - Go to `chrome://settings/system` and disable **"Use hardware acceleration when available"**. - Restart Chromium and see if the crash persists.
#### **2. Update the Kernel** - Ensure you’re on the latest stable kernel: ```bash sudo apt update && sudo apt full-upgrade ``` - Check if a newer kernel (e.g., `6.13.x` or `6.14.x`) fixes the issue.
#### **3. Check for Known Issues** - Search the [Raspberry Pi forums](https://www.raspberrypi.com/forums/) or [GitHub issues](https://github.com/raspberrypi/linux/issues) for "V3D crash chromium" or "v3d_irq panic".
- Look for patches or workarounds.
#### **4. Collect More Debug Info** - Enable kernel debugging: ```bash sudo dmesg -w ``` - Reproduce the crash and capture the full log. - Check if there’s a `coredump` or additional error messages before the crash.
#### **5. Test with a Different Browser** - Try Firefox or another browser to see if the issue is specific to Chromium.
#### **6. Check GPU Temperature** - Overheating can cause GPU instability: ```bash vcgencmd measure_temp ``` - Ensure proper cooling.
#### **7. Disable V3D Temporarily (Workaround)** - If the crash is critical, you can disable the V3D driver by adding `dtoverlay=disable-v3d` to `/boot/firmware/config.txt` (or `/boot/config.txt` on older setups). - **Note**: This will disable GPU acceleration, which may impact performance.
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### **Conclusion** This is likely a **bug in the V3D GPU driver** triggered by Chromium’s GPU usage. The best steps are: 1. **Disable GPU acceleration in Chromium** as a quick workaround. 2. **Update the kernel** to the latest version. 3. **Report the bug** to the Raspberry Pi Linux kernel maintainers if it persists.
If you need help interpreting more of the log or debugging further, feel free to share additional details!
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