CVE-2023-53465
📋 TL;DR
This CVE describes an out-of-bounds write vulnerability in the Linux kernel's Qualcomm SoundWire driver. An attacker could exploit this to corrupt kernel memory, potentially leading to system crashes or arbitrary code execution with kernel privileges. This affects Linux systems using the affected SoundWire driver.
💻 Affected Systems
- Linux kernel with Qualcomm SoundWire 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 →⚠️ Risk & Real-World Impact
Worst Case
Kernel memory corruption leading to arbitrary code execution with kernel privileges, system compromise, or persistent denial of service.
Likely Case
System crash or kernel panic resulting in denial of service, requiring system reboot.
If Mitigated
Limited impact if system has kernel hardening features like KASLR and SMEP/SMAP enabled.
🎯 Exploit Status
Exploitation requires local access and knowledge of kernel memory layout. No public exploits have been reported.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in Linux kernel stable releases containing commits: 20f7c4d51c94abb1a1a7c21900db4fb5afe5c8ff, 32eb67d7360d48c15883e0d21b29c0aab9da022e, 490937d479abe5f6584e69b96df066bc87be92e9, 801daff0078087b5df9145c9f5e643c28129734b
Vendor Advisory: https://git.kernel.org/stable/c/20f7c4d51c94abb1a1a7c21900db4fb5afe5c8ff
Restart Required: Yes
Instructions:
1. Update to a patched Linux kernel version from your distribution's repositories. 2. Reboot the system to load the new kernel. 3. Verify the fix is applied by checking kernel version or examining the driver code.
🔧 Temporary Workarounds
Disable SoundWire driver
linuxPrevent loading of the vulnerable Qualcomm SoundWire driver module
echo 'blacklist soundwire_qcom' >> /etc/modprobe.d/blacklist.conf
rmmod soundwire_qcom
🧯 If You Can't Patch
- Implement strict access controls to limit local user privileges
- Enable kernel hardening features like KASLR, SMEP, and SMAP if available
🔍 How to Verify
Check if Vulnerable:
Check if the soundwire_qcom module is loaded: lsmod | grep soundwire_qcom. If loaded and kernel version is unpatched, system is vulnerable.Check Version:
uname -rVerify Fix Applied:
Check kernel version against patched releases and verify soundwire_qcom module loads without errors in dmesg.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Ooops messages in dmesg related to soundwire_qcom
- System crash reports
Network Indicators:
- No network indicators - this is a local vulnerability
SIEM Query:
Search for kernel panic events or system crash reports in system logs