CVE-2024-57879
📋 TL;DR
A resource leak vulnerability in the Linux kernel's Bluetooth ISO (isochronous) subsystem where the hdev device reference isn't properly released on error paths in iso_listen_bis. This affects Linux systems with Bluetooth functionality enabled, potentially leading to resource exhaustion over time.
💻 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
Sustained exploitation could exhaust kernel memory resources, leading to system instability, denial of service, or kernel panic.
Likely Case
Gradual resource leakage requiring repeated exploitation attempts, potentially causing Bluetooth functionality degradation or system performance issues.
If Mitigated
Minimal impact with proper patching; resource leakage would be contained and cleaned up properly.
🎯 Exploit Status
Requires ability to trigger iso_listen_bis function with error conditions; local access or Bluetooth proximity needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel commits 4ca50db1c567d658d173c5ef3ee6c52b0b03603c and 9c76fff747a73ba01d1d87ed53dd9c00cb40ba05
Vendor Advisory: https://git.kernel.org/stable/c/4ca50db1c567d658d173c5ef3ee6c52b0b03603c
Restart Required: Yes
Instructions:
1. Update Linux kernel to version containing fixes 2. Reboot system 3. Verify kernel version includes the patches
🔧 Temporary Workarounds
Disable Bluetooth ISO functionality
linuxDisable Bluetooth isochronous channels if not required
modprobe -r btusb
systemctl disable bluetooth
🧯 If You Can't Patch
- Monitor system memory and resource usage for abnormal patterns
- Restrict Bluetooth access to trusted devices only
🔍 How to Verify
Check if Vulnerable:
Check kernel version and compare with patched versions; examine if Bluetooth ISO functionality is enabledCheck Version:
uname -rVerify Fix Applied:
Verify kernel version includes commits 4ca50db1c567d658d173c5ef3ee6c52b0b03603c and 9c76fff747a73ba01d1d87ed53dd9c00cb40ba05📡 Detection & Monitoring
Log Indicators:
- Kernel memory allocation failures
- Bluetooth subsystem errors
- Resource exhaustion warnings
Network Indicators:
- Abnormal Bluetooth ISO connection attempts
SIEM Query:
source="kernel" AND ("memory" OR "resource" OR "bluetooth") AND ("error" OR "failure" OR "exhaustion")