CVE-2024-26927 – This CVE describes a buffer overflow vulnerabil... (How to Fix)

Q: What is the severity of CVE-2024-26927?

CVE-2024-26927 has a CVSS score of 8.4 (HIGH). This CVE describes a buffer overflow vulnerability in the Linux kernel's Sound Open Firmware (SOF) subsystem. Attackers could exploit this to execute arbitrary code or cause denial-of-service by providing malicious firmware data. Systems running vulnerable Linux kernel versions with SOF enabled are affected.

📋 TL;DR

This CVE describes a buffer overflow vulnerability in the Linux kernel's Sound Open Firmware (SOF) subsystem. Attackers could exploit this to execute arbitrary code or cause denial-of-service by providing malicious firmware data. Systems running vulnerable Linux kernel versions with SOF enabled are affected.

💻 Affected Systems

Products:

Linux kernel

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

Operating Systems: Linux distributions using vulnerable kernel versions

Default Config Vulnerable: ⚠️ Yes

Notes: Only affects systems with Sound Open Firmware (SOF) subsystem enabled and using vulnerable firmware loading.

📦 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 →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution with kernel privileges leading to complete system compromise.

🟠

Likely Case

Kernel panic or system crash causing denial-of-service.

🟢

If Mitigated

System crash with automatic recovery if kernel panic handling is configured.

🌐 Internet-Facing: LOW - Requires local access or ability to load malicious firmware.

🏢 Internal Only: MEDIUM - Malicious users or compromised processes could exploit this locally.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Exploitation requires ability to load malicious firmware data, typically requiring local access or compromised process.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Multiple stable kernel versions with commits: 044e22066715, 98f681b0f84c, 9eeb8e1231f6, ced7df8b3c5c, d133d67e7e72

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

Restart Required: Yes

Instructions:

1. Update Linux kernel to patched version from your distribution. 2. Reboot system. 3. Verify kernel version after reboot.

🔧 Temporary Workarounds

Disable SOF module

linux

Prevent loading of Sound Open Firmware subsystem if not needed

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

🧯 If You Can't Patch

Restrict firmware loading to trusted sources only
Implement strict access controls to prevent unauthorized users from loading firmware

🔍 How to Verify

Check if Vulnerable:

Check kernel version and verify if SOF module is loaded: lsmod | grep snd_sof

Check Version:

uname -r

Verify Fix Applied:

Verify kernel version is updated and check git commit contains one of the fix commits

📡 Detection & Monitoring

Log Indicators:

Kernel panic messages
SOF firmware loading errors
System crash/reboot logs

Network Indicators:

None - local exploitation only

SIEM Query:

source="kernel" AND ("panic" OR "SOF" OR "firmware")

📊 Metadata

CVE ID: CVE-2024-26927

CVSS v3 Score: 8.4 (HIGH)

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

CWE: CWE-120

Published: April 28, 2024

Last Updated: March 21, 2025

🔗 References

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🔗 Related Vulnerabilities

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