CVE-2024-27404
📋 TL;DR
This CVE addresses a data race condition in the Linux kernel's MPTCP (Multipath TCP) implementation where concurrent access to the remote_id variable could cause memory corruption or system instability. It affects Linux systems using MPTCP functionality. 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 →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 panic, system crash, or privilege escalation leading to complete system compromise.
Likely Case
System instability, kernel crashes, or denial of service affecting MPTCP connections.
If Mitigated
Minimal impact with proper access controls preventing local user exploitation.
🎯 Exploit Status
Exploitation requires local access and race condition triggering. No public exploits known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patches available in stable kernel branches via provided git commits
Vendor Advisory: https://git.kernel.org/stable/c/2dba5774e8ed326a78ad4339d921a4291281ea6e
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version from distribution vendor. 2. Reboot system to load new kernel. 3. Verify kernel version after reboot.
🔧 Temporary Workarounds
Disable MPTCP
linuxDisable MPTCP functionality if not required
echo 0 > /proc/sys/net/mptcp/enabled
sysctl -w net.mptcp.enabled=0
🧯 If You Can't Patch
- Restrict local user access to prevent exploitation
- Implement strict process isolation and privilege separation
🔍 How to Verify
Check if Vulnerable:
Check kernel version and MPTCP status: cat /proc/sys/net/mptcp/enabledCheck Version:
uname -rVerify Fix Applied:
Verify kernel version is updated and check git commit contains fixes for remote_id data race📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- MPTCP connection failures
- System crash dumps
Network Indicators:
- MPTCP connection anomalies
- Unexpected TCP resets
SIEM Query:
source="kernel" AND ("panic" OR "oops" OR "MPTCP")🔗 References
- https://git.kernel.org/stable/c/2dba5774e8ed326a78ad4339d921a4291281ea6e
- https://git.kernel.org/stable/c/967d3c27127e71a10ff5c083583a038606431b61
- https://git.kernel.org/stable/c/987c3ed7297e5661bc7f448f06fc366e497ac9b2
- https://git.kernel.org/stable/c/e64148635509bf13eea851986f5a0b150e5bd066
- https://git.kernel.org/stable/c/2dba5774e8ed326a78ad4339d921a4291281ea6e
- https://git.kernel.org/stable/c/967d3c27127e71a10ff5c083583a038606431b61
- https://git.kernel.org/stable/c/987c3ed7297e5661bc7f448f06fc366e497ac9b2
- https://git.kernel.org/stable/c/e64148635509bf13eea851986f5a0b150e5bd066
