CVE-2024-56554
📋 TL;DR
This is a use-after-free vulnerability in the Linux kernel's binder IPC subsystem. It allows local attackers to potentially crash the system or execute arbitrary code with kernel privileges. Any system running an affected Linux kernel version with binder enabled is vulnerable.
💻 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 →⚠️ Risk & Real-World Impact
Worst Case
Kernel panic leading to denial of service, or privilege escalation allowing full system compromise.
Likely Case
System crash or instability requiring reboot, potentially leading to data loss or service disruption.
If Mitigated
Limited impact if binder IPC is disabled or system has strict process isolation.
🎯 Exploit Status
Exploitation requires local access and knowledge of kernel memory layout. No public exploits known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions including commit 7e20434cbca814cb91a0a261ca0106815ef48e5f or fe39e0ea2d0ba7f508ff453c4c9a44a95ec0de29
Vendor Advisory: https://git.kernel.org/stable/c/7e20434cbca814cb91a0a261ca0106815ef48e5f
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version. 2. Check with your distribution for specific kernel package updates. 3. Reboot system after update.
🔧 Temporary Workarounds
Disable binder IPC
linuxRemove binder module if not required for system functionality
modprobe -r binder
echo 'blacklist binder' >> /etc/modprobe.d/blacklist.conf
🧯 If You Can't Patch
- Restrict local user access to minimize attack surface
- Implement strict process isolation and privilege separation
🔍 How to Verify
Check if Vulnerable:
Check kernel version and if binder module is loaded: 'lsmod | grep binder' and 'uname -r'Check Version:
uname -rVerify Fix Applied:
Verify kernel version includes fix commit: 'grep -q 7e20434cbca814cb91a0a261ca0106815ef48e5f /proc/version'📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- KASAN reports mentioning binder_release_work
- System crash dumps
Network Indicators:
- None - local exploit only
SIEM Query:
source="kernel" AND ("KASAN" OR "use-after-free" OR "binder_release_work")