CVE-2025-38398
📋 TL;DR
A memory corruption vulnerability in the Linux kernel's SPI-QPIC-SNAND driver allows out-of-bounds memory access when handling NAND flash operations. This affects Linux systems using Qualcomm NAND controllers with the spi-qpic-snand driver. The vulnerability can lead to system crashes, kernel panics, or potential privilege escalation.
💻 Affected Systems
- Linux kernel with spi-qpic-snand 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 →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 privilege escalation, arbitrary code execution in kernel context, or complete system compromise.
Likely Case
System instability, kernel panics, crashes during NAND operations, or denial of service requiring system reboot.
If Mitigated
Limited to local attackers with ability to trigger specific NAND operations; proper access controls reduce impact.
🎯 Exploit Status
Exploitation requires triggering specific NAND operations; memory corruption could potentially be leveraged for privilege escalation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Linux kernel with commits 86fb36de1132b560f9305f0c78fa69f459fa0980 and d85d0380292a7e618915069c3579ae23c7c80339 applied
Vendor Advisory: https://git.kernel.org/stable/c/86fb36de1132b560f9305f0c78fa69f459fa0980
Restart Required: Yes
Instructions:
1. Update to a Linux kernel version containing the fix commits
2. Rebuild kernel if compiling from source
3. Reboot system to load patched kernel
🔧 Temporary Workarounds
Disable spi-qpic-snand driver
linuxRemove or blacklist the vulnerable driver if not required
echo 'blacklist spi-qpic-snand' >> /etc/modprobe.d/blacklist.conf
rmmod spi_qpic_snand
🧯 If You Can't Patch
- Restrict access to users who can trigger NAND operations
- Monitor system logs for kernel panic or memory corruption indicators
🔍 How to Verify
Check if Vulnerable:
Check if spi-qpic-snand driver is loaded and kernel version is before fix: 'lsmod | grep spi_qpic_snand && uname -r'Check Version:
uname -rVerify Fix Applied:
Verify kernel version includes fix commits or spi-qpic-snand driver is not loaded📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- 'swiotlb buffer is full' errors
- 'failure in mapping desc' errors
- spinlock bad magic errors
Network Indicators:
- None - local vulnerability
SIEM Query:
source="kernel" AND ("swiotlb buffer is full" OR "failure in mapping desc" OR "spinlock bad magic")