CVE-2022-49792
📋 TL;DR
This CVE-2022-49792 is an out-of-bounds read vulnerability in the Linux kernel's mp2629 ADC driver. It could allow local attackers to read kernel memory beyond allocated boundaries, potentially exposing sensitive information. Systems using affected Linux kernel versions with the mp2629 ADC driver are 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 →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 →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 memory disclosure leading to information leaks, potential privilege escalation if combined with other vulnerabilities, or system instability/crashes.
Likely Case
Information disclosure of kernel memory contents, potentially exposing sensitive data or system state information to local attackers.
If Mitigated
Minimal impact with proper kernel hardening, SELinux/AppArmor, and restricted local access.
🎯 Exploit Status
Requires local access and knowledge of driver usage. No public exploits known as of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions containing commits: 1678d4abb2dc2ca3b05b998a9d88616976e4f947, 399b2105a2240e730b9f3880bd8f154247539aa7, ca1547ab15f48dc81624183ae17a2fd1bad06dfc, d95b85c5084ad70011988861ee864529eefa1da0
Vendor Advisory: https://git.kernel.org/stable/c/1678d4abb2dc2ca3b05b998a9d88616976e4f947
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version from your distribution. 2. Reboot system to load new kernel. 3. Verify kernel version after reboot.
🔧 Temporary Workarounds
Disable mp2629 ADC driver module
linuxPrevent loading of vulnerable driver module if not needed
echo 'blacklist mp2629_adc' >> /etc/modprobe.d/blacklist.conf
rmmod mp2629_adc
🧯 If You Can't Patch
- Restrict local access to systems using mp2629 ADC hardware
- Implement strict kernel hardening and memory protection mechanisms
🔍 How to Verify
Check if Vulnerable:
Check if mp2629 ADC driver is loaded: lsmod | grep mp2629; and check kernel version against patched versionsCheck Version:
uname -rVerify Fix Applied:
Verify kernel version includes fix commits and mp2629 driver loads without errors in dmesg📡 Detection & Monitoring
Log Indicators:
- Kernel oops messages
- Driver initialization failures in dmesg
- Unexpected memory access patterns
Network Indicators:
- None - local vulnerability only
SIEM Query:
source="kernel" AND ("mp2629" OR "out of bounds" OR "oops")