CVE-2024-50127
📋 TL;DR
This CVE describes a use-after-free vulnerability in the Linux kernel's network scheduler (taprio_change() function). Attackers could potentially exploit this to cause kernel crashes, privilege escalation, or arbitrary code execution. Systems running affected Linux kernel versions with network scheduling 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 →⚠️ Risk & Real-World Impact
Worst Case
Kernel panic leading to system crash, or privilege escalation allowing root access and complete system compromise.
Likely Case
System instability, kernel crashes, or denial of service affecting network scheduling functionality.
If Mitigated
Limited impact if exploit attempts are blocked by security controls like SELinux/apparmor, with potential for system crashes only.
🎯 Exploit Status
Exploitation requires kernel-level programming knowledge and specific conditions (taprio configuration). No public exploits known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patches available in stable kernel trees (see git.kernel.org references)
Vendor Advisory: https://git.kernel.org/stable/c/0d4c0d2844e4eac3aed647f948fd7e60eea56a61
Restart Required: Yes
Instructions:
1. Update to patched kernel version from your distribution's repository. 2. Reboot system to load new kernel. 3. Verify kernel version after reboot.
🔧 Temporary Workarounds
Disable taprio scheduling
linuxRemove or disable taprio network scheduling configurations if not required
tc qdisc del dev <interface> root
Remove taprio configurations from network scripts
🧯 If You Can't Patch
- Disable taprio network scheduling on all interfaces
- Implement strict network segmentation to limit access to systems with taprio configured
🔍 How to Verify
Check if Vulnerable:
Check kernel version and verify if taprio scheduling is configured: 'tc qdisc show | grep taprio'Check Version:
uname -rVerify Fix Applied:
Verify kernel version is updated to patched version and no taprio configurations exist📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- KASAN use-after-free reports in dmesg
- Network scheduling errors
Network Indicators:
- Abnormal network scheduling behavior
- Unexpected traffic patterns on taprio-configured interfaces
SIEM Query:
source="kernel" AND ("panic" OR "use-after-free" OR "KASAN")🔗 References
- https://git.kernel.org/stable/c/0d4c0d2844e4eac3aed647f948fd7e60eea56a61
- https://git.kernel.org/stable/c/2240f9376f20f8b6463232b4ca7292569217237f
- https://git.kernel.org/stable/c/2f868ce6013548a713c431c679ef73747a66fcf3
- https://git.kernel.org/stable/c/8a283a19026aaae8a773fd8061263cfa315b127f
- https://git.kernel.org/stable/c/999612996df28d81f163dad530d7f8026e03aec6
- https://git.kernel.org/stable/c/f504465970aebb2467da548f7c1efbbf36d0f44b
- https://git.kernel.org/stable/c/fe371f084073e8672a2d7d46b335c3c060d1e301
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
