CVE-2022-48807
📋 TL;DR
A kernel memory corruption vulnerability in the Linux kernel's Intel Ethernet Controller ice driver allows attackers to trigger a KASAN stack-out-of-bounds error when network devices are unregistered. This affects Linux systems using Intel Ethernet Controllers with Link Aggregation (LAG) enabled. The vulnerability can lead to system crashes or potential privilege escalation.
💻 Affected Systems
- Linux kernel with Intel Ethernet Controller ice 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 →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, or potential privilege escalation if combined with other vulnerabilities to achieve arbitrary code execution.
Likely Case
System crash or kernel panic when network interfaces are removed or modified, causing temporary denial of service.
If Mitigated
Minimal impact with proper kernel hardening and isolation, though system instability may still occur during network operations.
🎯 Exploit Status
Exploitation requires ability to trigger NETDEV_UNREGISTER events, typically requiring local access or network configuration privileges.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patches available in Linux kernel stable branches (commits: bea1898f65b9b7096cb4e73e97c83b94718f1fa1, f9daedc3ab8f673e3a9374b91a89fbf1174df469, faa9bcf700ca1a0d09f92502a6b65d3ce313fb46)
Vendor Advisory: https://git.kernel.org/stable/c/bea1898f65b9b7096cb4e73e97c83b94718f1fa1
Restart Required: Yes
Instructions:
1. Update Linux kernel to version containing the fix. 2. For distributions: Use package manager to update kernel package. 3. Reboot system to load patched kernel.
🔧 Temporary Workarounds
Disable ice driver
linuxTemporarily disable the vulnerable Intel Ethernet Controller ice driver if not required
modprobe -r ice
echo 'blacklist ice' >> /etc/modprobe.d/blacklist.conf
Restrict network configuration
linuxLimit user/process access to network interface configuration to prevent triggering NETDEV_UNREGISTER events
chmod 600 /sys/class/net/*/bonding/*
setcap -r /sbin/ip
setcap -r /sbin/ifconfig
🧯 If You Can't Patch
- Disable Link Aggregation (LAG) features on affected network interfaces
- Implement strict access controls to prevent unauthorized users from modifying network interfaces
🔍 How to Verify
Check if Vulnerable:
Check if ice driver is loaded: lsmod | grep ice. Check kernel version: uname -r and compare with patched versions.Check Version:
uname -rVerify Fix Applied:
Verify kernel version after update contains fix commits. Check dmesg for KASAN errors related to ice driver during network operations.📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- KASAN stack-out-of-bounds errors in dmesg
- NETDEV_UNREGISTER events with ice driver
Network Indicators:
- Unexpected network interface removal
- Network connectivity loss on systems with Intel Ethernet Controllers
SIEM Query:
source="kernel" AND ("KASAN" OR "stack-out-of-bounds" OR "ice" AND "panic")🔗 References
- https://git.kernel.org/stable/c/bea1898f65b9b7096cb4e73e97c83b94718f1fa1
- https://git.kernel.org/stable/c/f9daedc3ab8f673e3a9374b91a89fbf1174df469
- https://git.kernel.org/stable/c/faa9bcf700ca1a0d09f92502a6b65d3ce313fb46
- https://git.kernel.org/stable/c/bea1898f65b9b7096cb4e73e97c83b94718f1fa1
- https://git.kernel.org/stable/c/f9daedc3ab8f673e3a9374b91a89fbf1174df469
- https://git.kernel.org/stable/c/faa9bcf700ca1a0d09f92502a6b65d3ce313fb46
