CVE-2024-53063

Q: What is the severity of CVE-2024-53063?

CVE-2024-53063 has a CVSS score of 5.5 (MEDIUM). This CVE addresses a potential out-of-bounds memory access vulnerability in the Linux kernel's DVB (Digital Video Broadcasting) subsystem. When CONFIG_DVB_DYNAMIC_MINORS is not configured, boundary checks are missing in device registration and opening functions, which could allow local attackers to cause memory corruption. This affects Linux systems with DVB devices enabled.

5.5 MEDIUM

Denial of Service

📋 TL;DR

This CVE addresses a potential out-of-bounds memory access vulnerability in the Linux kernel's DVB (Digital Video Broadcasting) subsystem. When CONFIG_DVB_DYNAMIC_MINORS is not configured, boundary checks are missing in device registration and opening functions, which could allow local attackers to cause memory corruption. This affects Linux systems with DVB devices enabled.

💻 Affected Systems

Products:

Linux kernel

Versions: Specific affected versions not explicitly stated, but patches are available in stable kernel trees.

Operating Systems: Linux distributions with vulnerable kernel versions

Default Config Vulnerable: ✅ No

Notes: Only vulnerable when DVB subsystem is enabled and CONFIG_DVB_DYNAMIC_MINORS is not set. Many distributions disable DVB 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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⚠️ Risk & Real-World Impact

🔴

Worst Case

Local privilege escalation leading to kernel panic, system crash, or arbitrary code execution in kernel context.

🟠

Likely Case

Local denial of service through kernel panic or system instability.

🟢

If Mitigated

No impact with proper kernel configuration or patched systems.

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

🏢 Internal Only: MEDIUM - Local users or processes could potentially exploit this vulnerability.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Requires local access and knowledge of DVB device operations. No public exploits known at this time.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Patches available in stable kernel trees (commits: 1e461672616b726f29261ee81bb991528818537c, 3b88675e18b6517043a6f734eaa8ea6eb3bfa140, 5f76f7df14861e3a560898fa41979ec92424b58f, 972e63e895abbe8aa1ccbdbb4e6362abda7cd457, 9c17085fabbde2041c893d29599800f2d4992b23)

Vendor Advisory: https://git.kernel.org/stable/c/1e461672616b726f29261ee81bb991528818537c

Restart Required: Yes

Instructions:

1. Update to a patched kernel version from your distribution's repositories. 2. Reboot the system to load the new kernel. 3. Verify the patch is applied by checking kernel version.

🔧 Temporary Workarounds

Disable DVB subsystem

linux

Disable the DVB subsystem in kernel configuration if not needed.

echo 'blacklist dvb-core' > /etc/modprobe.d/disable-dvb.conf
update-initramfs -u
reboot

Enable CONFIG_DVB_DYNAMIC_MINORS

linux

Configure kernel with dynamic minors enabled to avoid the vulnerable code path.

Recompile kernel with CONFIG_DVB_DYNAMIC_MINORS=y

🧯 If You Can't Patch

Restrict local user access to systems with DVB devices
Monitor system logs for unusual DVB device operations or kernel panics

🔍 How to Verify

Check if Vulnerable:

Check if DVB modules are loaded: lsmod | grep dvb. Check kernel config: grep CONFIG_DVB_DYNAMIC_MINORS /boot/config-$(uname -r)

Check Version:

uname -r

Verify Fix Applied:

Verify kernel version is updated to include the patch commits. Check that DVB_DYNAMIC_MINORS is enabled or DVB is disabled.

📡 Detection & Monitoring

Log Indicators:

Kernel panic messages
OOM (Out of Memory) errors in kernel logs
DVB device registration failures

Network Indicators:

None - local vulnerability only

SIEM Query:

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

📊 Metadata

CVE ID: CVE-2024-53063

CVSS v3 Score: 5.5 (MEDIUM)

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

CWE: CWE-755

Published: November 19, 2024

Last Updated: November 3, 2025

📋 TL;DR

💻 Affected Systems

📦 What is this software?

Linux Kernel by Linux

Linux Kernel by Linux

Linux Kernel by Linux

Linux Kernel by Linux

Linux Kernel by Linux

Linux Kernel by Linux

Linux Kernel by Linux

Linux Kernel by Linux

Linux Kernel by Linux

Linux Kernel by Linux

Linux Kernel by Linux

Linux Kernel by Linux

Linux Kernel by Linux

⚠️ Risk & Real-World Impact

Worst Case

Likely Case

If Mitigated

🎯 Exploit Status

🛠️ Fix & Mitigation

✅ Official Fix

Instructions:

🔧 Temporary Workarounds

Disable DVB subsystem

Enable CONFIG_DVB_DYNAMIC_MINORS

🧯 If You Can't Patch

🔍 How to Verify

Check if Vulnerable:

Check Version:

Verify Fix Applied:

📡 Detection & Monitoring

Log Indicators:

Network Indicators:

SIEM Query:

📊 Metadata

🔗 References

📤 Share & Export

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