CVE-2024-47670 – This CVE describes an out-of-bounds memory acce... (How to Fix)

Q: What is the severity of CVE-2024-47670?

CVE-2024-47670 has a CVSS score of 7.8 (HIGH). This CVE describes an out-of-bounds memory access vulnerability in the Linux kernel's ocfs2 filesystem driver. Attackers could exploit this by mounting a maliciously crafted OCFS2 filesystem image, potentially leading to kernel crashes or arbitrary code execution. Systems using OCFS2 (Oracle Cluster File System) are affected.

📋 TL;DR

This CVE describes an out-of-bounds memory access vulnerability in the Linux kernel's ocfs2 filesystem driver. Attackers could exploit this by mounting a maliciously crafted OCFS2 filesystem image, potentially leading to kernel crashes or arbitrary code execution. Systems using OCFS2 (Oracle Cluster File System) are affected.

💻 Affected Systems

Products:

Linux kernel with OCFS2 support

Versions: Linux kernel versions before the fix commits (specific versions vary by distribution)

Operating Systems: Linux distributions with OCFS2 support enabled

Default Config Vulnerable: ✅ No

Notes: Only systems using OCFS2 filesystem are vulnerable. OCFS2 is not enabled by default in most distributions.

📦 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 panic leading to system crash or arbitrary code execution with kernel privileges, potentially resulting in full system compromise.

🟠

Likely Case

Kernel crash causing system instability or denial of service, requiring system reboot.

🟢

If Mitigated

Limited impact if OCFS2 is not used or if untrusted filesystem images cannot be mounted.

🌐 Internet-Facing: LOW - Requires mounting malicious filesystem images, unlikely via internet-facing interfaces.

🏢 Internal Only: MEDIUM - Internal attackers with ability to mount filesystems could exploit this vulnerability.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Requires ability to mount a malicious OCFS2 filesystem image. No public exploit code known at this time.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Linux kernel with commits 1f6e167d6753fe3ea493cdc7f7de8d03147a4d39 or later

Vendor Advisory: https://git.kernel.org/stable/c/1f6e167d6753fe3ea493cdc7f7de8d03147a4d39

Restart Required: Yes

Instructions:

1. Update Linux kernel to version containing the fix. 2. Check distribution-specific security advisories. 3. Reboot system to load new kernel.

🔧 Temporary Workarounds

Disable OCFS2 module

linux

Prevent loading of OCFS2 kernel module if not needed

echo 'install ocfs2 /bin/false' >> /etc/modprobe.d/disable-ocfs2.conf
rmmod ocfs2

Restrict filesystem mounting

linux

Limit who can mount filesystems using mount permissions

chmod 700 /bin/mount
setfacl -m u:root:rwx /bin/mount

🧯 If You Can't Patch

Disable OCFS2 kernel module if not required for operations
Implement strict access controls on who can mount filesystems

🔍 How to Verify

Check if Vulnerable:

Check if OCFS2 module is loaded: lsmod | grep ocfs2

Check Version:

uname -r

Verify Fix Applied:

Check kernel version against distribution security advisory or verify fix commit is present

📡 Detection & Monitoring

Log Indicators:

Kernel panic messages
OCFS2-related errors in dmesg
System crash/reboot logs

Network Indicators:

None - local filesystem vulnerability

SIEM Query:

source="kernel" AND ("panic" OR "ocfs2" OR "general protection fault")

📊 Metadata

CVE ID: CVE-2024-47670

CVSS v3 Score: 7.8 (HIGH)

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE: CWE-787

Published: October 9, 2024

Last Updated: November 3, 2025

🔗 References

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🔗 Related Vulnerabilities

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