CVE-2025-71156
📋 TL;DR
A race condition vulnerability in the Linux kernel's gve (Google Virtual Ethernet) driver where interrupts could fire before NAPI (New API) context initialization, potentially causing kernel panics or system crashes. This affects systems using the gve driver, primarily cloud environments and virtualized systems with Google Cloud Platform networking.
💻 Affected Systems
- Linux kernel gve driver
📦 What is this software?
Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →⚠️ Risk & Real-World Impact
Worst Case
Kernel panic leading to system crash and denial of service, potentially causing data loss or service disruption.
Likely Case
System instability or crashes during network interface initialization, particularly in virtualized environments.
If Mitigated
Minor performance impact during driver initialization with proper patching.
🎯 Exploit Status
Exploitation requires triggering the race condition during network interface initialization, making it difficult to weaponize reliably.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Linux kernel with commits 3d970eda003441f66551a91fda16478ac0711617, 48f9277680925e1a8623d6b2c50aadb7af824ace, f5b7f49bd2377916ad57cbd1210c61196daff013
Vendor Advisory: https://git.kernel.org/stable/c/3d970eda003441f66551a91fda16478ac0711617
Restart Required: Yes
Instructions:
1. Update Linux kernel to version containing the fix commits. 2. Reboot system to load new kernel. 3. Verify gve driver loads without errors.
🔧 Temporary Workarounds
Disable gve driver
linuxPrevent loading of vulnerable gve driver if not required
echo 'blacklist gve' >> /etc/modprobe.d/blacklist.conf
rmmod gve
🧯 If You Can't Patch
- Avoid restarting network services or reloading gve driver
- Monitor system logs for gve-related crashes and have recovery procedures ready
🔍 How to Verify
Check if Vulnerable:
Check if gve module is loaded: lsmod | grep gve. Check kernel version: uname -r and compare with patched versions.Check Version:
uname -rVerify Fix Applied:
Check kernel contains fix commits: git log --oneline | grep -E '3d970eda|48f92776|f5b7f49b'. Load gve driver and monitor for initialization errors.📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages during boot
- gve driver initialization failures in dmesg
- Call traces mentioning __napi_poll or net_rx_action
Network Indicators:
- Network interface failures on systems using gve driver
SIEM Query:
source="kernel" AND ("gve" OR "NAPI" OR "interrupt") AND ("panic" OR "crash" OR "Call Trace")