CVE-2024-41090
📋 TL;DR
A vulnerability in the Linux kernel's TAP device driver allows short Ethernet frames (shorter than the Ethernet header size) to be processed incorrectly in the XDP path, potentially causing memory corruption or inconsistent network packet handling. This affects systems using TAP devices with XDP enabled, primarily Linux servers and containers. Attackers could exploit this to cause denial of service or potentially execute arbitrary code.
💻 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 →⚠️ Risk & Real-World Impact
Worst Case
Kernel memory corruption leading to system crash, privilege escalation, or remote code execution.
Likely Case
Denial of service through kernel panic or system instability when processing malformed packets.
If Mitigated
Minimal impact if XDP is disabled or proper network filtering blocks malicious packets.
🎯 Exploit Status
Exploitation requires ability to send crafted packets to TAP interfaces with XDP enabled. No public exploits known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patches available in stable kernel trees (references provided in CVE)
Vendor Advisory: https://git.kernel.org/stable/c/73d462a38d5f782b7c872fe9ae8393d9ef5483da
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version from your distribution. 2. Reboot system to load new kernel. 3. Verify kernel version matches patched release.
🔧 Temporary Workarounds
Disable XDP on TAP devices
linuxRemove XDP programs from TAP interfaces to avoid vulnerable code path
ip link set dev <tap_device> xdp off
Network filtering
linuxUse firewall rules to block packets to TAP interfaces from untrusted sources
iptables -A INPUT -i <tap_device> -j DROP
🧯 If You Can't Patch
- Disable XDP functionality on all TAP devices
- Implement strict network segmentation to isolate TAP interfaces from untrusted networks
🔍 How to Verify
Check if Vulnerable:
Check if system uses TAP devices with XDP enabled and has unpatched kernel versionCheck Version:
uname -rVerify Fix Applied:
Verify kernel version is updated to include the fix commits referenced in CVE📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- OOM killer activity
- Network interface errors
Network Indicators:
- Malformed short Ethernet packets sent to TAP interfaces
SIEM Query:
source="kernel" AND ("panic" OR "Oops" OR "general protection fault")🔗 References
- https://git.kernel.org/stable/c/73d462a38d5f782b7c872fe9ae8393d9ef5483da
- https://git.kernel.org/stable/c/7431144b406ae82807eb87d8c98e518475b0450f
- https://git.kernel.org/stable/c/8be915fc5ff9a5e296f6538be12ea75a1a93bdea
- https://git.kernel.org/stable/c/aa6a5704cab861c9b2ae9f475076e1881e87f5aa
- https://git.kernel.org/stable/c/e1a786b9bbb767fd1c922d424aaa8078cc542309
- https://git.kernel.org/stable/c/e5e5e63c506b93b89b01f522b6a7343585f784e6
- https://git.kernel.org/stable/c/ed7f2afdd0e043a397677e597ced0830b83ba0b3
- https://git.kernel.org/stable/c/ee93e6da30377cf2a75e16cd32bb9fcd86a61c46
- https://git.kernel.org/stable/c/73d462a38d5f782b7c872fe9ae8393d9ef5483da
- https://git.kernel.org/stable/c/7431144b406ae82807eb87d8c98e518475b0450f
- https://git.kernel.org/stable/c/8be915fc5ff9a5e296f6538be12ea75a1a93bdea
- https://git.kernel.org/stable/c/aa6a5704cab861c9b2ae9f475076e1881e87f5aa
- https://git.kernel.org/stable/c/e1a786b9bbb767fd1c922d424aaa8078cc542309
- https://git.kernel.org/stable/c/e5e5e63c506b93b89b01f522b6a7343585f784e6
- https://git.kernel.org/stable/c/ed7f2afdd0e043a397677e597ced0830b83ba0b3
- https://git.kernel.org/stable/c/ee93e6da30377cf2a75e16cd32bb9fcd86a61c46
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
