CVE-2022-49731
📋 TL;DR
This CVE describes a NULL pointer dereference vulnerability in the Linux kernel's ATA subsystem. If exploited, it could cause a kernel panic (system crash) leading to denial of service. Systems running vulnerable Linux kernel versions with ATA storage devices are affected.
💻 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 panic leading to complete system crash and denial of service, potentially causing data loss or corruption if storage operations are interrupted.
Likely Case
System crash requiring reboot, resulting in temporary service disruption.
If Mitigated
No impact if the vulnerable code path is not triggered or if the system has proper kernel protections.
🎯 Exploit Status
No known public exploits. The vulnerability was found through static analysis and requires local access or ability to trigger specific ATA operations.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions containing the fixes referenced in the git commits
Vendor Advisory: https://git.kernel.org/stable/c/07cbdb4807d369fbda73062a91b570c4dc5ec429
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version. 2. Check distribution-specific advisories for exact version requirements. 3. Reboot system after kernel update.
🔧 Temporary Workarounds
No specific workaround available
linuxThis is a kernel-level bug that requires patching. No configuration changes can mitigate the vulnerability.
🧯 If You Can't Patch
- Restrict local access to systems to prevent potential exploitation by malicious users
- Implement strict access controls and monitoring for systems that cannot be patched immediately
🔍 How to Verify
Check if Vulnerable:
Check kernel version and compare with distribution's security advisories. Vulnerable if running unpatched kernel versions containing the bug.Check Version:
uname -rVerify Fix Applied:
Verify kernel version after update matches patched versions from distribution security advisories.📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages in system logs
- ATA subsystem error messages
- System crash/reboot events
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
Search for kernel panic events or system crash logs that may indicate exploitation attempts🔗 References
- https://git.kernel.org/stable/c/07cbdb4807d369fbda73062a91b570c4dc5ec429
- https://git.kernel.org/stable/c/1ac5efee33f29e704226506d429b84575a5d66f8
- https://git.kernel.org/stable/c/253334f84c81bc6a43af489f108c0bddad989eef
- https://git.kernel.org/stable/c/36cd19e7d4e5571d77a2ed20c5b6ef50cf57734a
- https://git.kernel.org/stable/c/a810bd5af06977a847d1f202b22d7defd5c62497
- https://git.kernel.org/stable/c/bf476fe22aa1851bab4728e0c49025a6a0bea307
- https://git.kernel.org/stable/c/ca4693e6e06e4fd2b240c0fec47aa2498c94848e
- https://git.kernel.org/stable/c/ff128fbea720bf763fa345680dda5f050bc24a47
