CVE-2025-22112
📋 TL;DR
This CVE describes an out-of-bounds memory access vulnerability in the Linux kernel's Broadcom NetXtreme Ethernet driver (bnxt). An attacker could potentially cause a kernel panic or system crash by triggering this bug. Systems running affected Linux kernel versions with bnxt drivers are vulnerable.
💻 Affected Systems
- Linux kernel with bnxt 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 denial of service, potentially allowing local privilege escalation if combined with other vulnerabilities.
Likely Case
System crash or kernel panic causing denial of service on affected systems.
If Mitigated
Limited impact if proper kernel hardening and access controls are in place, but still risk of DoS.
🎯 Exploit Status
Requires local access or ability to trigger specific network operations; not trivial to exploit remotely
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patches available in stable kernel trees (see references)
Vendor Advisory: https://git.kernel.org/stable/c/919f9f497dbcee75d487400e8f9815b74a6a37df
Restart Required: Yes
Instructions:
1. Update to patched kernel version from your distribution. 2. Reboot system. 3. Verify bnxt driver is loaded with patched kernel.
🔧 Temporary Workarounds
Disable bnxt driver
linuxBlacklist or disable the bnxt driver if not needed
echo 'blacklist bnxt' >> /etc/modprobe.d/blacklist.conf
rmmod bnxt
🧯 If You Can't Patch
- Restrict local user access to systems with bnxt drivers
- Implement strict network segmentation to limit attack surface
🔍 How to Verify
Check if Vulnerable:
Check if bnxt module is loaded: lsmod | grep bnxtCheck Version:
uname -rVerify Fix Applied:
Check kernel version after update and verify bnxt module loads without issues📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- bnxt driver crash logs
- system crash dumps
Network Indicators:
- Unexpected network interface resets on bnxt devices
SIEM Query:
search 'kernel panic' OR 'bnxt' OR 'out of bounds' in system logs