CVE-2024-27065
📋 TL;DR
A vulnerability in the Linux kernel's netfilter nf_tables subsystem allows improper handling of table flag comparisons during updates. This could lead to privilege escalation or denial of service by allowing unauthorized modifications to network filtering rules. Systems running affected Linux kernel versions with netfilter enabled 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 →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 gains root privileges through kernel memory corruption or causes kernel panic leading to system crash.
Likely Case
Local privilege escalation allowing unprivileged user to gain root access or disrupt network filtering functionality.
If Mitigated
Limited impact if proper access controls restrict local user accounts and SELinux/AppArmor are properly configured.
🎯 Exploit Status
Requires local access and knowledge of kernel exploitation techniques. No public exploit code identified at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Multiple stable kernel versions with fixes available (see git references in CVE)
Vendor Advisory: https://git.kernel.org/stable/c/2531f907d3e40a6173090f10670ae76d117ab27b
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
Disable netfilter modules
linuxRemove or blacklist nf_tables kernel modules to disable vulnerable functionality
modprobe -r nf_tables
echo 'blacklist nf_tables' >> /etc/modprobe.d/blacklist.conf
Restrict local user access
linuxImplement strict access controls to limit local user accounts and capabilities
usermod -L username
chmod 700 /home/*
🧯 If You Can't Patch
- Implement strict SELinux/AppArmor policies to restrict kernel module access
- Monitor for unusual privilege escalation attempts and kernel panic events
🔍 How to Verify
Check if Vulnerable:
Check kernel version and compare with patched versions from distribution vendorCheck Version:
uname -rVerify Fix Applied:
Verify kernel version after update matches patched version from vendor advisory📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- Unusual privilege escalation in audit logs
- nf_tables module loading errors
Network Indicators:
- Unexpected changes to firewall rules
- Network filtering anomalies
SIEM Query:
source="kernel" AND ("panic" OR "Oops") OR source="audit" AND "privilege" AND "escalation"🔗 References
- https://git.kernel.org/stable/c/2531f907d3e40a6173090f10670ae76d117ab27b
- https://git.kernel.org/stable/c/3443e57654f90c9a843ab6a6040c10709fd033aa
- https://git.kernel.org/stable/c/4a0e7f2decbf9bd72461226f1f5f7dcc4b08f139
- https://git.kernel.org/stable/c/4d37f12707ee965d338028732575f0b85f6d9e4f
- https://git.kernel.org/stable/c/640dbf688ba955e83e03de84fbdda8e570b7cce4
- https://git.kernel.org/stable/c/845083249d6a392f3a88804e1669bdb936ee129f
- https://git.kernel.org/stable/c/9683cb6c2c6c0f45537bf0b8868b5d38fcb63fc7
- https://git.kernel.org/stable/c/df257c435e51651c43b86326d112ddadda76350e
- https://git.kernel.org/stable/c/fcf32a5bfcb8a57ac0ce717fcfa4d688c91f1005
- https://git.kernel.org/stable/c/2531f907d3e40a6173090f10670ae76d117ab27b
- https://git.kernel.org/stable/c/3443e57654f90c9a843ab6a6040c10709fd033aa
- https://git.kernel.org/stable/c/4a0e7f2decbf9bd72461226f1f5f7dcc4b08f139
- https://git.kernel.org/stable/c/4d37f12707ee965d338028732575f0b85f6d9e4f
- https://git.kernel.org/stable/c/640dbf688ba955e83e03de84fbdda8e570b7cce4
- https://git.kernel.org/stable/c/845083249d6a392f3a88804e1669bdb936ee129f
- https://git.kernel.org/stable/c/9683cb6c2c6c0f45537bf0b8868b5d38fcb63fc7
- https://git.kernel.org/stable/c/df257c435e51651c43b86326d112ddadda76350e
- https://git.kernel.org/stable/c/fcf32a5bfcb8a57ac0ce717fcfa4d688c91f1005
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
