## https://sploitus.com/exploit?id=4314D6AD-2408-54AD-B17C-9825C526A34D
# CVE-2022-0185-Analysis-and-Exploit
Research and proof-of-concept for CVE-2022-0185 Linux kernel heap overflow vulnerability.
CVE-2022-0185 – Linux Kernel Heap Overflow Analysis
Overview
CVE-2022-0185 is a heap-based buffer overflow vulnerability in the Linux kernel’s filesystem context implementation. The issue exists in the legacy_parse_param() function and can allow local privilege escalation under certain configurations.
CVE ID: CVE-2022-0185
Component: Linux kernel filesystem context
Vulnerability type: Heap buffer overflow
Attack vector: Local
Impact: Privilege escalation
Author: Sandesh Pantha
Project Type: Security Research and Educational Demonstration
Official references:
NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2022-0185
Openwall advisory: https://www.openwall.com/lists/oss-security/2022/01/18/7
Linux kernel fix commit: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=722d94847de29310e8aa03fcbdb41fc92c521756
Vulnerability Root Cause
The vulnerability is caused by improper bounds checking when parsing filesystem parameters via the fsconfig() system call.
In legacy_parse_param():
User-controlled data is appended to an internal buffer
The size calculation does not properly prevent overflow
Repeated calls can cause heap memory corruption
This results in an out-of-bounds write into adjacent heap objects, which can potentially lead to:
Kernel memory corruption
Information disclosure
Use-after-free conditions
Privilege escalation
Affected versions include Linux kernels prior to:
5.11.0
5.16.2
5.15.16
5.10.93
Research Focus
This project demonstrates:
Filesystem context creation using fsopen()
Parameter injection through fsconfig()
Kernel heap spraying techniques
Message queue based heap grooming
Socket buffer spraying
Controlled object reuse patterns
The goal of this repository is educational: understanding kernel heap behavior and vulnerability exploitation methodology in a controlled lab environment.
Lab Environment
Testing should only be performed in an isolated virtual machine.
Recommended setup:
Ubuntu 20.04 or Debian with a vulnerable kernel
QEMU or VirtualBox
Snapshot enabled before testing
Non-production environment
Never run this on production systems.
Mitigation
The vulnerability was fixed by correcting the bounds validation logic in legacy_parse_param().
Mitigation steps:
Upgrade to a patched kernel version
Disable unprivileged user namespaces where possible
Monitor for abnormal filesystem context activity
Kernel versions containing the fix:
5.16.2
5.15.16
5.10.93
Patch reference:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/
What This Project Demonstrates
Deep understanding of Linux kernel internals
Heap memory layout awareness
Kernel object lifecycle manipulation
Secure vulnerability research methodology
Responsible disclosure practices
Ethical Use
This project is provided for educational and defensive security research purposes only.
Do not attempt to use this knowledge on systems without explicit authorization.