CVE-2022-1679
📋 TL;DR
CVE-2022-1679 is a use-after-free vulnerability in the Linux kernel's Atheros wireless adapter driver (ath9k_htc). It allows a local attacker to crash the system or potentially escalate privileges by forcing a specific function to fail. This affects Linux systems using the vulnerable driver, particularly those with Atheros wireless hardware.
💻 Affected Systems
- Linux kernel with ath9k_htc 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 →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 root, leading to full system compromise.
Likely Case
Kernel crash (denial of service) due to memory corruption.
If Mitigated
Minimal impact if patched or workarounds applied, with no remote exploitation.
🎯 Exploit Status
Exploitation involves triggering a use-after-free condition in kernel memory, which can be complex but feasible for skilled attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check distribution-specific updates (e.g., Debian security updates, kernel patches from upstream).
Vendor Advisory: https://security.netapp.com/advisory/ntap-20220629-0007/
Restart Required: Yes
Instructions:
1. Update the Linux kernel via your distribution's package manager (e.g., 'apt update && apt upgrade' for Debian/Ubuntu). 2. Reboot the system to load the new kernel.
🔧 Temporary Workarounds
Disable ath9k_htc driver
linuxPrevents use of the vulnerable driver by blacklisting it.
echo 'blacklist ath9k_htc' | sudo tee /etc/modprobe.d/ath9k_htc.conf
sudo modprobe -r ath9k_htc
🧯 If You Can't Patch
- Restrict local user access to minimize attack surface.
- Monitor system logs for kernel crashes or suspicious driver activity.
🔍 How to Verify
Check if Vulnerable:
Check kernel version and driver status: 'uname -r' and 'lsmod | grep ath9k_htc'.Check Version:
uname -rVerify Fix Applied:
Verify kernel version is updated and no longer vulnerable per vendor advisory; check 'uname -r' matches patched version.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs, oops messages in /var/log/kern.log or dmesg related to ath9k_htc.
Network Indicators:
- None, as it's a local exploit.
SIEM Query:
Search for 'ath9k_htc' or 'kernel oops' in system logs.🔗 References
- https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html
- https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html
- https://lore.kernel.org/lkml/87ilqc7jv9.fsf%40kernel.org/t/
- https://security.netapp.com/advisory/ntap-20220629-0007/
- https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html
- https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html
- https://lore.kernel.org/lkml/87ilqc7jv9.fsf%40kernel.org/t/
- https://security.netapp.com/advisory/ntap-20220629-0007/
