CVE-2024-47697 – This vulnerability in the Linux kernel's RTL283... (How to Fix)

Q: What is the severity of CVE-2024-47697?

CVE-2024-47697 has a CVSS score of 7.8 (HIGH). This vulnerability in the Linux kernel's RTL2830 DVB frontend driver allows an out-of-bounds write when processing PID filter operations. An attacker with local access could potentially write beyond the allocated buffer boundaries, leading to kernel memory corruption. This affects systems using the affected kernel versions with the rtl2830 driver loaded.

📋 TL;DR

This vulnerability in the Linux kernel's RTL2830 DVB frontend driver allows an out-of-bounds write when processing PID filter operations. An attacker with local access could potentially write beyond the allocated buffer boundaries, leading to kernel memory corruption. This affects systems using the affected kernel versions with the rtl2830 driver loaded.

💻 Affected Systems

Products:

Linux kernel

Versions: Kernel versions containing the vulnerable code (specific versions depend on distribution backports)

Operating Systems: Linux distributions using affected kernel versions

Default Config Vulnerable: ✅ No

Notes: Only vulnerable if the rtl2830 DVB frontend driver is loaded and in use. Many systems won't have this driver loaded by default.

📦 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...

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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, kernel panic causing system crash, or arbitrary code execution in kernel context.

🟠

Likely Case

Kernel crash leading to denial of service, or limited memory corruption affecting system stability.

🟢

If Mitigated

No impact if the driver is not loaded or the system is patched.

🌐 Internet-Facing: LOW - Requires local access to exploit.

🏢 Internal Only: MEDIUM - Local users or compromised accounts could exploit this vulnerability.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Requires local access and knowledge of driver usage. The vulnerability is in a specific driver that may not be present on all systems.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Kernel versions with commit 042b101d7bf70616c4967c286ffa6fcca65babfb or later

Vendor Advisory: https://git.kernel.org/stable/c/042b101d7bf70616c4967c286ffa6fcca65babfb

Restart Required: Yes

Instructions:

1. Update kernel to patched version from your distribution. 2. For custom kernels, apply commit 042b101d7bf70616c4967c286ffa6fcca65babfb. 3. Reboot system to load new kernel.

🔧 Temporary Workarounds

Disable rtl2830 driver

linux

Prevent loading of the vulnerable driver module

echo 'blacklist rtl2830' >> /etc/modprobe.d/blacklist-rtl2830.conf
rmmod rtl2830

🧯 If You Can't Patch

Ensure the rtl2830 driver is not loaded (check with lsmod)
Restrict local user access to systems where this driver is required

🔍 How to Verify

Check if Vulnerable:

Check if rtl2830 module is loaded: lsmod | grep rtl2830. If loaded, check kernel version against patched versions.

Check Version:

uname -r

Verify Fix Applied:

Verify kernel version includes the fix commit: grep -q '042b101d7bf70616c4967c286ffa6fcca65babfb' /proc/version_signature (if available) or check distribution patch notes.

📡 Detection & Monitoring

Log Indicators:

Kernel oops messages
System crashes when using DVB devices
dmesg errors related to rtl2830

SIEM Query:

source="kernel" AND ("rtl2830" OR "oops" OR "general protection fault")

📊 Metadata

CVE ID: CVE-2024-47697

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 21, 2024

Last Updated: November 3, 2025

🔗 References

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🔗 Related Vulnerabilities

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