CVE-2024-56725
📋 TL;DR
This CVE addresses an improper check for return values in the Linux kernel's octeontx2-pf driver, specifically in the Data Center Bridging (DCB) network layer component. The vulnerability could allow local attackers to cause a kernel panic or system crash by triggering error conditions. Systems using affected Linux kernel versions with the octeontx2-pf driver loaded are at risk.
💻 Affected Systems
- Linux kernel with octeontx2-pf driver
📦 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 →⚠️ Risk & Real-World Impact
Worst Case
Local attacker triggers kernel panic leading to denial of service, potentially causing system instability or crash.
Likely Case
System crash or kernel panic resulting in temporary service disruption requiring reboot.
If Mitigated
Minimal impact with proper access controls limiting local user privileges.
🎯 Exploit Status
Requires local access and ability to trigger specific error conditions in the DCB subsystem.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patches available in stable kernel trees (commits referenced in CVE)
Vendor Advisory: https://git.kernel.org/stable/c/54e8b501b3ea9371e4a9aa639c75b681fa5680f0
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version from distribution vendor. 2. Rebuild kernel if compiling from source with patches applied. 3. Reboot system to load new kernel.
🔧 Temporary Workarounds
Unload octeontx2-pf driver
linuxRemove the vulnerable driver module if not required for system operation
sudo rmmod octeontx2-pf
🧯 If You Can't Patch
- Restrict local user access to systems using octeontx2-pf hardware
- Implement monitoring for kernel panic events and system crashes
🔍 How to Verify
Check if Vulnerable:
Check if octeontx2-pf driver is loaded: lsmod | grep octeontx2-pfCheck Version:
uname -rVerify Fix Applied:
Check kernel version is updated and driver version matches patched release📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages in /var/log/kern.log or dmesg
- System crash/reboot events
Network Indicators:
- Unusual DCB configuration changes if monitored
SIEM Query:
source="kernel" AND "panic" OR "oops" AND "octeontx2"🔗 References
- https://git.kernel.org/stable/c/54e8b501b3ea9371e4a9aa639c75b681fa5680f0
- https://git.kernel.org/stable/c/69297b0d3369488af259e3a7cf53d69157938ea1
- https://git.kernel.org/stable/c/6ee6cf42dc5230425cfce1ffefa5a8d8a99e6fce
- https://git.kernel.org/stable/c/b94052830e3cd3be7141789a5ce6e62cf9f620a4
- https://git.kernel.org/stable/c/b99db02209ca4c2e2f53b82049ea3cbc82b54895
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
