CVE-2022-49047
📋 TL;DR
This CVE describes a use-after-free vulnerability in the Linux kernel's ep93xx clock driver. An attacker could potentially exploit this to cause kernel crashes or execute arbitrary code with kernel privileges. This affects systems running vulnerable Linux kernel versions with ARM ep93xx architecture support.
💻 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 or local privilege escalation allowing full system compromise.
Likely Case
Kernel crash causing system instability or denial of service.
If Mitigated
No impact if patched or if ep93xx architecture is not used.
🎯 Exploit Status
Requires local access and knowledge of kernel exploitation techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patches available in stable kernel trees (see references)
Vendor Advisory: https://git.kernel.org/stable/c/0f12166872da46c6b57ba2f1314bbf310b3bf017
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version. 2. Reboot system. 3. Verify kernel version after reboot.
🔧 Temporary Workarounds
Disable ep93xx architecture support
LinuxRemove or disable ep93xx architecture support if not needed
# Recompile kernel without CONFIG_ARCH_EP93XX
🧯 If You Can't Patch
- Restrict local user access to systems
- Implement strict privilege separation and monitoring
🔍 How to Verify
Check if Vulnerable:
Check kernel version and if ep93xx architecture is enabled: cat /proc/cpuinfo | grep -i ep93xxCheck Version:
uname -rVerify Fix Applied:
Verify kernel version is updated and system is stable after patch📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- System crash logs
- Unexpected reboots
Network Indicators:
- None - local vulnerability
SIEM Query:
search 'kernel panic' OR 'system crash' OR 'segmentation fault' in kernel logs