CVE-2022-1652
📋 TL;DR
CVE-2022-1652 is a use-after-free vulnerability in the Linux kernel's floppy disk driver that allows local attackers to execute arbitrary code or cause denial of service. This affects Linux systems with the floppy driver loaded, though floppy hardware is rarely used today. Attackers need local access to exploit this vulnerability.
💻 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 →⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with kernel-level arbitrary code execution leading to complete control of the affected system.
Likely Case
Kernel panic or system crash causing denial of service, potentially requiring physical reboot.
If Mitigated
Minimal impact if floppy driver is not loaded or access controls prevent local user execution.
🎯 Exploit Status
Exploit requires local access and ability to execute code. Proof-of-concept code has been published demonstrating the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Linux kernel 5.17.3 and later
Vendor Advisory: https://bugzilla.redhat.com/show_bug.cgi?id=1832397
Restart Required: Yes
Instructions:
1. Update Linux kernel to version 5.17.3 or later. 2. For distributions with backported patches, apply security updates. 3. Reboot system to load patched kernel.
🔧 Temporary Workarounds
Unload floppy driver module
linuxRemove floppy driver from kernel if loaded as module
rmmod floppy
echo 'blacklist floppy' > /etc/modprobe.d/blacklist-floppy.conf
Prevent floppy driver loading
linuxPrevent floppy driver from being loaded at boot
echo 'install floppy /bin/false' > /etc/modprobe.d/disable-floppy.conf
update-initramfs -u
🧯 If You Can't Patch
- Unload floppy driver module if present: rmmod floppy
- Implement strict access controls to prevent local users from executing arbitrary code
🔍 How to Verify
Check if Vulnerable:
Check if floppy module is loaded: lsmod | grep floppy. Check kernel version: uname -rCheck Version:
uname -rVerify Fix Applied:
Verify kernel version is 5.17.3 or later: uname -r. Check if floppy module is not loaded: lsmod | grep -i floppy📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- OOM killer activity related to floppy
- System crash/reboot logs
Network Indicators:
- None - local exploit only
SIEM Query:
source="kernel" AND ("floppy" OR "bad_flp_intr") AND ("panic" OR "crash" OR "Oops")🔗 References
- https://bugzilla.redhat.com/show_bug.cgi?id=1832397
- https://francozappa.github.io/about-bias/
- https://kb.cert.org/vuls/id/647177/
- https://security.netapp.com/advisory/ntap-20220722-0002/
- https://www.debian.org/security/2022/dsa-5173
- https://bugzilla.redhat.com/show_bug.cgi?id=1832397
- https://francozappa.github.io/about-bias/
- https://kb.cert.org/vuls/id/647177/
- https://security.netapp.com/advisory/ntap-20220722-0002/
- https://www.debian.org/security/2022/dsa-5173
