CVE-2024-36023
📋 TL;DR
This CVE describes a null pointer dereference vulnerability in the Linux kernel that could cause a kernel panic or system crash. It affects Linux systems running vulnerable kernel versions. The vulnerability requires local access to exploit.
💻 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
Local attacker causes kernel panic leading to denial of service and system reboot.
Likely Case
System crash requiring reboot, potentially causing service disruption.
If Mitigated
Minimal impact with proper access controls limiting local user privileges.
🎯 Exploit Status
Requires local access and knowledge of triggering conditions. No public exploit code identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions containing commits: 214a6c4a28c11d67044e6cf3a0ab415050d9f03a, 2e2177f94c0e0bc41323d7b6975a5f4820ed347e, 9bf93dcfc453fae192fe5d7874b89699e8f800ac, b972e8ac3f44f693127a2806031962d100dfc4d1
Vendor Advisory: https://git.kernel.org/stable/c/214a6c4a28c11d67044e6cf3a0ab415050d9f03a
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version from your distribution's repositories. 2. Reboot system to load new kernel. 3. Verify kernel version after reboot.
🔧 Temporary Workarounds
Restrict local user access
linuxLimit local user accounts and privileges to reduce attack surface.
# Review and remove unnecessary local accounts
# Implement least privilege principles
🧯 If You Can't Patch
- Implement strict access controls to limit local user accounts
- Monitor system logs for kernel panic events and unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check kernel version against distribution security advisories for affected versions.Check Version:
uname -rVerify Fix Applied:
Verify kernel version after update matches patched version from distribution.📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages in /var/log/kern.log or dmesg
- System crash/reboot events
Network Indicators:
- None - local exploit only
SIEM Query:
Search for 'kernel panic' or 'Oops' in system logs🔗 References
- https://git.kernel.org/stable/c/214a6c4a28c11d67044e6cf3a0ab415050d9f03a
- https://git.kernel.org/stable/c/2e2177f94c0e0bc41323d7b6975a5f4820ed347e
- https://git.kernel.org/stable/c/9bf93dcfc453fae192fe5d7874b89699e8f800ac
- https://git.kernel.org/stable/c/b972e8ac3f44f693127a2806031962d100dfc4d1
- https://git.kernel.org/stable/c/214a6c4a28c11d67044e6cf3a0ab415050d9f03a
- https://git.kernel.org/stable/c/2e2177f94c0e0bc41323d7b6975a5f4820ed347e
- https://git.kernel.org/stable/c/9bf93dcfc453fae192fe5d7874b89699e8f800ac
- https://git.kernel.org/stable/c/b972e8ac3f44f693127a2806031962d100dfc4d1
