CVE-2024-50029
📋 TL;DR
This CVE describes a use-after-free vulnerability in the Linux kernel's Bluetooth subsystem. An attacker could potentially exploit this to crash the kernel or execute arbitrary code with kernel privileges. Systems running vulnerable Linux kernel versions with Bluetooth enabled are affected.
💻 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 →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 or potential arbitrary code execution with kernel privileges, resulting in complete system compromise.
Likely Case
Kernel panic causing system instability or crash, requiring reboot to restore functionality.
If Mitigated
System remains stable with no impact if Bluetooth is disabled or the vulnerability is patched.
🎯 Exploit Status
Exploitation requires Bluetooth access and timing to trigger the race condition. No public exploits have been reported as of the CVE publication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in kernel commits: 18fd04ad856df07733f5bb07e7f7168e7443d393, 867639300759e3e1c5b1e1a5ff89231f263a32a7, 98ccd44002d88cbf4edfc4480df532a3da5a013e
Vendor Advisory: https://git.kernel.org/stable/c/18fd04ad856df07733f5bb07e7f7168e7443d393
Restart Required: Yes
Instructions:
1. Update Linux kernel to version containing the fix commits. 2. Check your distribution's security advisories for backported patches. 3. Reboot the system after kernel update.
🔧 Temporary Workarounds
Disable Bluetooth
linuxTemporarily disable Bluetooth functionality to prevent exploitation
sudo systemctl stop bluetooth
sudo systemctl disable bluetooth
sudo rfkill block bluetooth
🧯 If You Can't Patch
- Disable Bluetooth functionality completely on affected systems
- Implement network segmentation to limit Bluetooth device access to trusted networks only
🔍 How to Verify
Check if Vulnerable:
Check kernel version and if Bluetooth is enabled: 'uname -r' and 'systemctl status bluetooth'Check Version:
uname -rVerify Fix Applied:
Verify kernel version is updated and contains the fix commits: 'uname -r' and check distribution patch notes📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- KASAN reports in dmesg
- Bluetooth subsystem crashes
Network Indicators:
- Unusual Bluetooth connection attempts
- Multiple failed Bluetooth pairing attempts
SIEM Query:
source="kernel" AND ("KASAN" OR "use-after-free" OR "hci_enhanced_setup_sync")