CVE-2022-50044
📋 TL;DR
A race condition vulnerability in the Linux kernel's Qualcomm QRTR networking subsystem allows kernel panics or service enumeration failures when MHI channels generate events before endpoint creation completes. This affects Linux systems using Qualcomm-based hardware with QRTR networking enabled.
💻 Affected Systems
- Linux kernel
📦 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 →⚠️ Risk & Real-World Impact
Worst Case
Kernel panic leading to system crash and denial of service
Likely Case
QRTR service enumeration failures preventing proper network communication
If Mitigated
Minor service disruption if QRTR networking is not critical for system operation
🎯 Exploit Status
Requires specific hardware configuration and timing conditions to trigger
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions containing commits 68a838b84effb7b57ba7d50b1863fc6ae35a54ce, a1a75f78a2937567946b1b756f82462874b5ca20, or c682fb70a7dfc25b848a4ff3a385b0471b470606
Vendor Advisory: https://git.kernel.org/stable/c/68a838b84effb7b57ba7d50b1863fc6ae35a54ce
Restart Required: Yes
Instructions:
1. Update Linux kernel to version containing the fix commits. 2. Check distribution-specific security advisories. 3. Reboot system after kernel update.
🔧 Temporary Workarounds
Disable QRTR networking
linuxDisable the QRTR networking subsystem if not required
modprobe -r qrtr
echo 'blacklist qrtr' >> /etc/modprobe.d/blacklist.conf
🧯 If You Can't Patch
- Ensure QRTR networking is disabled if not required
- Monitor system logs for kernel panic events related to QRTR
🔍 How to Verify
Check if Vulnerable:
Check kernel version and if QRTR module is loaded: lsmod | grep qrtrCheck Version:
uname -rVerify Fix Applied:
Verify kernel version includes fix commits and test QRTR functionality📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- QRTR-related error messages in dmesg
- Service enumeration failures
Network Indicators:
- QRTR service discovery failures
SIEM Query:
search 'kernel panic' OR 'qrtr' OR 'MHI channel' in system logs