CVE-2025-38129
📋 TL;DR
A use-after-free vulnerability in the Linux kernel's page pool subsystem allows an attacker to cause memory corruption when recycling network pages. This affects all Linux systems using the page pool feature for network packet handling. The vulnerability can lead to kernel crashes or potential privilege escalation.
💻 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 →⚠️ Risk & Real-World Impact
Worst Case
Kernel panic leading to system crash, or potential privilege escalation allowing full system compromise.
Likely Case
System instability, kernel crashes, or denial of service affecting network performance.
If Mitigated
Limited impact if systems are patched or don't use page pool feature extensively.
🎯 Exploit Status
Exploitation requires triggering specific page pool recycling conditions with network traffic.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions with commits 1a8c0b61d4cb55c5440583ec9e7f86a730369e32 or later
Vendor Advisory: https://git.kernel.org/stable/c/1a8c0b61d4cb55c5440583ec9e7f86a730369e32
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version from your distribution vendor. 2. Reboot system to load new kernel. 3. Verify kernel version after reboot.
🔧 Temporary Workarounds
Disable page pool feature
linuxDisable the page pool subsystem to prevent the vulnerability from being triggered
echo 0 > /sys/module/page_pool/parameters/enabled
🧯 If You Can't Patch
- Monitor system logs for kernel panics or memory corruption warnings
- Implement network filtering to block suspicious traffic patterns
🔍 How to Verify
Check if Vulnerable:
Check kernel version and compare against patched versions from your distribution vendorCheck Version:
uname -rVerify Fix Applied:
Verify kernel version matches or exceeds patched version after update📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- KASAN use-after-free reports
- Memory corruption warnings in dmesg
Network Indicators:
- Unusual network traffic patterns triggering page recycling
SIEM Query:
source="kernel" AND ("KASAN" OR "use-after-free" OR "page_pool")🔗 References
- https://git.kernel.org/stable/c/1a8c0b61d4cb55c5440583ec9e7f86a730369e32
- https://git.kernel.org/stable/c/271683bb2cf32e5126c592b5d5e6a756fa374fd9
- https://git.kernel.org/stable/c/4914c0a166540e534a0c1d43affd329d95fb56fd
- https://git.kernel.org/stable/c/4ab8c0f8905c9c4d05e7f437e65a9a365573ff02
- https://git.kernel.org/stable/c/d69f28ef7cdafdcf37ee310f38b1399e7d05f9a8
- https://git.kernel.org/stable/c/e869a85acc2e60dc554579b910826a4919d8cd98
