CVE-2023-53670
📋 TL;DR
This CVE describes a memory leak vulnerability in the Linux kernel's NVMe driver. When NVMe controller initialization fails, the driver doesn't properly clean up power management quality of service structures, causing kernel memory to leak. This affects systems using NVMe storage devices with the affected Linux kernel versions.
💻 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 →⚠️ Risk & Real-World Impact
Worst Case
Sustained exploitation could lead to kernel memory exhaustion, causing system instability, crashes, or denial of service through resource depletion.
Likely Case
Memory leak accumulates over time during NVMe controller initialization failures, potentially degrading system performance or causing kernel panics in memory-constrained environments.
If Mitigated
With proper monitoring and restart policies, impact is limited to temporary performance degradation during NVMe initialization failures.
🎯 Exploit Status
Requires ability to trigger NVMe controller initialization failures, which typically requires privileged access or specific hardware conditions
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Multiple stable kernel versions with commits: 2ed9a89192e3192e5fea7ff6475c8722513f325e, 7237c26431cc78e5ec3259f4350f3dd58f6a4319, 7ed5cf8e6d9bfb6a78d0471317edff14f0f2b4dd, e1379e067b9485e5af03399fe3f0d39bccb023ad
Vendor Advisory: https://git.kernel.org/stable/c/2ed9a89192e3192e5fea7ff6475c8722513f325e
Restart Required: Yes
Instructions:
1. Identify current kernel version. 2. Update to patched kernel version from your distribution's repositories. 3. Reboot system to load new kernel.
🔧 Temporary Workarounds
Monitor NVMe initialization
allMonitor system logs for NVMe initialization failures and restart affected services
journalctl -k | grep -i 'nvme.*error\|nvme.*fail'
dmesg | grep -i nvme
🧯 If You Can't Patch
- Implement kernel memory monitoring and alerting for unusual growth patterns
- Restrict access to NVMe management interfaces to prevent triggering initialization failures
🔍 How to Verify
Check if Vulnerable:
Check kernel version and compare with patched versions from kernel git repositoryCheck Version:
uname -rVerify Fix Applied:
Verify kernel version after update matches patched version, monitor for memory leaks using tools like kmemleak📡 Detection & Monitoring
Log Indicators:
- Kernel messages about NVME initialization failures
- Memory allocation errors in kernel logs
Network Indicators:
- None - this is a local kernel issue
SIEM Query:
source="kernel" AND ("nvme" AND ("error" OR "fail" OR "memory"))