CVE-2022-49253
📋 TL;DR
This CVE describes a memory leak vulnerability in the Linux kernel's go7007 driver for USB video capture devices. When the s2250-board probe function fails, it doesn't properly clean up i2c device registration, causing a kernel memory leak. This affects Linux systems using specific USB video capture hardware with the vulnerable driver.
💻 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
Sustained exploitation could lead to kernel memory exhaustion, causing system instability, crashes, or denial of service.
Likely Case
Memory leak accumulates over time during device initialization failures, potentially causing performance degradation or system instability.
If Mitigated
With proper monitoring and restart policies, impact is limited to temporary device initialization failures.
🎯 Exploit Status
Exploitation requires physical access to connect malicious USB device or ability to trigger device initialization failures. Not remotely exploitable.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions with commit 14cd5a8e61c654828a1f1056d56f0b0a524d2c69 or later
Vendor Advisory: https://git.kernel.org/stable/c/14cd5a8e61c654828a1f1056d56f0b0a524d2c69
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version. 2. Check distribution-specific security advisories. 3. Reboot system to load new kernel.
🔧 Temporary Workarounds
Disable go7007 driver module
linuxPrevent loading of vulnerable driver module
echo 'blacklist go7007' >> /etc/modprobe.d/blacklist.conf
rmmod go7007
Restrict USB device access
linuxPrevent unauthorized USB device connections
echo 'install usb-storage /bin/false' >> /etc/modprobe.d/disable-usb-storage.conf
🧯 If You Can't Patch
- Monitor kernel memory usage for unusual patterns
- Implement strict USB device connection policies and physical security controls
🔍 How to Verify
Check if Vulnerable:
Check kernel version and if go7007 module is loaded: uname -r && lsmod | grep go7007Check Version:
uname -rVerify Fix Applied:
Verify kernel version includes fix commit: git log --oneline | grep '14cd5a8e61c654828a1f1056d56f0b0a524d2c69'📡 Detection & Monitoring
Log Indicators:
- Kernel oops messages
- Memory allocation failures in dmesg
- USB device initialization errors
Network Indicators:
- None - not network exploitable
SIEM Query:
source="kernel" AND ("go7007" OR "s2250-board" OR "memory allocation failure")🔗 References
- https://git.kernel.org/stable/c/14cd5a8e61c654828a1f1056d56f0b0a524d2c69
- https://git.kernel.org/stable/c/44973633b0064c46083833b55dd0a45e6235f8ca
- https://git.kernel.org/stable/c/67e4550ecd6164bfbdff54c169e5bbf9ccfaf14d
- https://git.kernel.org/stable/c/895364fa97e60749855f789bc4568883fc7a8b39
- https://git.kernel.org/stable/c/948ad5e5624487079c24cb5c81c74ddd02832440
- https://git.kernel.org/stable/c/a97130cd5b0c00eec169b10a16d922b9ea67324a
- https://git.kernel.org/stable/c/b5470f3efa530b10296257bb578ce4b1769e9a04
- https://git.kernel.org/stable/c/b7dd177225355da55f8d80d8e568928e0eec3608
- https://git.kernel.org/stable/c/bbdd0e15738336e6b1208304ae98525117877bbd
