CVE-2024-57911 – This CVE describes an information leak vulnerab... (How to Fix)

Q: What is the severity of CVE-2024-57911?

CVE-2024-57911 has a CVSS score of 7.1 (HIGH). This CVE describes an information leak vulnerability in the Linux kernel's IIO (Industrial I/O) dummy driver. When triggered buffer data is pushed to userspace, uninitialized memory from inactive channels can be exposed, potentially leaking sensitive kernel memory contents. This affects systems using the iio_simply_dummy_buffer module.

📋 TL;DR

This CVE describes an information leak vulnerability in the Linux kernel's IIO (Industrial I/O) dummy driver. When triggered buffer data is pushed to userspace, uninitialized memory from inactive channels can be exposed, potentially leaking sensitive kernel memory contents. This affects systems using the iio_simply_dummy_buffer module.

💻 Affected Systems

Products:

Linux kernel with IIO subsystem

Versions: Specific affected kernel versions not specified in CVE, but patches available in stable branches

Operating Systems: Linux distributions using vulnerable kernel versions

Default Config Vulnerable: ✅ No

Notes: Only vulnerable if the iio_simply_dummy_buffer module is loaded and used. This is typically a testing/development module.

📦 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 →

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 memory disclosure could reveal sensitive information like encryption keys, process memory, or other privileged data that could facilitate further attacks.

🟠

Likely Case

Information disclosure of kernel memory contents, potentially revealing system state or configuration details that could aid attackers in reconnaissance.

🟢

If Mitigated

Limited information exposure with minimal impact if proper access controls and isolation are in place.

🌐 Internet-Facing: LOW - This requires local access or specific kernel module usage, not directly exploitable over network.

🏢 Internal Only: MEDIUM - Local attackers or malicious users could exploit this to gather system information for privilege escalation or lateral movement.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Requires local access and ability to interact with the IIO dummy buffer interface. Exploitation depends on module usage and system configuration.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Patched in stable kernel branches via commit 006073761888a632c5d6f93e47c41760fa627f77 and related commits

Vendor Advisory: https://git.kernel.org/stable/c/006073761888a632c5d6f93e47c41760fa627f77

Restart Required: Yes

Instructions:

1. Update to a patched kernel version from your distribution. 2. Reboot the system. 3. Verify the module is not loaded if not needed.

🔧 Temporary Workarounds

Disable IIO dummy module

all

Prevent loading of the vulnerable iio_simply_dummy_buffer module

echo 'blacklist iio_simply_dummy_buffer' >> /etc/modprobe.d/blacklist.conf
rmmod iio_simply_dummy_buffer 2>/dev/null || true

🧯 If You Can't Patch

Ensure the iio_simply_dummy_buffer module is not loaded (check with lsmod)
Restrict access to IIO device interfaces and implement strict user privilege separation

🔍 How to Verify

Check if Vulnerable:

Check if iio_simply_dummy_buffer module is loaded: lsmod | grep iio_simply_dummy_buffer

Check Version:

uname -r

Verify Fix Applied:

Check kernel version is patched and module is either not loaded or updated: uname -r and verify against distribution security advisories

📡 Detection & Monitoring

Log Indicators:

Kernel logs showing IIO dummy buffer activity
Unexpected access to /sys/bus/iio/devices/

Network Indicators:

Not applicable - local vulnerability

SIEM Query:

process.name: 'kernel' AND log.message: '*iio*' AND log.message: '*dummy*'

📊 Metadata

CVE ID: CVE-2024-57911

CVSS v3 Score: 7.1 (HIGH)

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

CWE: CWE-908

EPSS Score: 0.05% exploit probability (15.8th percentile)

Published: January 19, 2025

Last Updated: November 3, 2025

🔗 References

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