CVE-2023-53652
📋 TL;DR
This CVE-2023-53652 is an out-of-bounds read vulnerability in the Linux kernel's vDPA (virtual Data Path Acceleration) subsystem. It allows attackers with local access to potentially read kernel memory, leading to information disclosure or system crashes. This affects Linux systems using vDPA functionality, particularly in virtualization environments.
💻 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 memory disclosure leading to privilege escalation, system crash, or information leakage of sensitive data from kernel space.
Likely Case
System crash or denial of service through kernel panic, potentially allowing information disclosure of kernel memory contents.
If Mitigated
Minimal impact if proper access controls prevent local attackers from accessing vDPA interfaces.
🎯 Exploit Status
Requires local access and ability to interact with vDPA netlink interface. Similar to CVE-2023-3773 which had OOB read issues.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in kernel commits: 44b508cc96889e61799cc0fc6c00766a54f3ab5a, 645d17e06c502e71b880b2b854930e5a64014640, 79c8651587504ba263d2fd67fd4406240fb21f69
Vendor Advisory: https://git.kernel.org/stable/c/44b508cc96889e61799cc0fc6c00766a54f3ab5a
Restart Required: Yes
Instructions:
1. Update Linux kernel to version containing the fix commits. 2. Check your distribution's security advisories for patched kernel packages. 3. Reboot system after kernel update.
🔧 Temporary Workarounds
Disable vDPA functionality
linuxIf vDPA is not required, disable it to remove attack surface
modprobe -r vdpa
echo 'blacklist vdpa' >> /etc/modprobe.d/blacklist.conf
Restrict netlink access
linuxLimit which users can access netlink sockets
chmod 600 /proc/sys/net/core/wmem_default
setfacl -m u:root:rw /proc/sys/net/core/wmem_default
🧯 If You Can't Patch
- Implement strict access controls to prevent unauthorized local users from accessing system
- Monitor for suspicious netlink socket activity and system crashes
🔍 How to Verify
Check if Vulnerable:
Check kernel version and if vDPA modules are loaded: 'uname -r' and 'lsmod | grep vdpa'Check Version:
uname -rVerify Fix Applied:
Verify kernel version includes fix commits or check with distribution-specific security tools📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- OOM killer messages
- Netlink socket permission denied errors
Network Indicators:
- Local netlink socket connections to vDPA
SIEM Query:
source="kernel" AND ("panic" OR "Oops" OR "vdpa")