CVE-2023-1989
📋 TL;DR
A use-after-free vulnerability in the Linux kernel's Bluetooth subsystem allows local attackers to potentially execute arbitrary code or cause denial of service. This affects Linux systems with Bluetooth hardware and the btsdio driver loaded. Attackers need local access to exploit this vulnerability.
💻 Affected Systems
- Linux Kernel
📦 What is this software?
H300s by Netapp
H410c by Netapp
H410s by Netapp
H500s by Netapp
H700s by Netapp
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
Local privilege escalation to kernel-level code execution, potentially leading to full system compromise.
Likely Case
Kernel panic or system crash causing denial of service.
If Mitigated
Minimal impact if Bluetooth is disabled or the vulnerable driver isn't loaded.
🎯 Exploit Status
Requires local access and ability to trigger race condition during Bluetooth device removal.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions with commit f132c2d13088 or later
Vendor Advisory: https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=f132c2d13088
Restart Required: Yes
Instructions:
1. Update Linux kernel to version containing fix commit f132c2d13088. 2. For Debian systems, apply security updates via apt-get update && apt-get upgrade. 3. Reboot system to load patched kernel.
🔧 Temporary Workarounds
Disable Bluetooth
linuxPrevent loading of vulnerable btsdio driver by disabling Bluetooth
systemctl disable bluetooth
modprobe -r btsdio
Blacklist btsdio driver
linuxPrevent kernel from loading the vulnerable driver module
echo 'blacklist btsdio' >> /etc/modprobe.d/blacklist-btsdio.conf
🧯 If You Can't Patch
- Disable Bluetooth functionality if not required
- Implement strict access controls to limit local user privileges
🔍 How to Verify
Check if Vulnerable:
Check kernel version and if btsdio module is loaded: uname -r && lsmod | grep btsdioCheck Version:
uname -rVerify Fix Applied:
Verify kernel version includes fix commit: grep -q f132c2d13088 /proc/version || echo 'Check kernel changelog'📡 Detection & Monitoring
Log Indicators:
- Kernel oops messages
- System crashes during Bluetooth operations
- dmesg errors mentioning btsdio or use-after-free
Network Indicators:
- None - local exploitation only
SIEM Query:
source="kernel" AND ("btsdio" OR "use-after-free" OR "UAF")🔗 References
- https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=f132c2d13088
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
- https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
- https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
- https://security.netapp.com/advisory/ntap-20230601-0004/
- https://www.debian.org/security/2023/dsa-5492
- https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=f132c2d13088
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
- https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
- https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
- https://security.netapp.com/advisory/ntap-20230601-0004/
- https://www.debian.org/security/2023/dsa-5492
