CVE-2024-42088
📋 TL;DR
This CVE describes an out-of-bounds memory access vulnerability in the Linux kernel's MediaTek ASoC driver for mt8195 chipsets. The vulnerability occurs when the kernel attempts to access a platforms array that lacks proper initialization, potentially leading to kernel memory corruption. This affects Linux systems using MediaTek mt8195-based hardware with the vulnerable driver loaded.
💻 Affected Systems
- Linux kernel with MediaTek ASoC driver for mt8195
📦 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 →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, denial of service, or potential privilege escalation if combined with other vulnerabilities.
Likely Case
Kernel panic and system crash when the vulnerable code path is triggered, resulting in denial of service.
If Mitigated
System remains stable as the vulnerable code path is not triggered during normal operation.
🎯 Exploit Status
Exploitation requires triggering the specific code path in mtk_soundcard_common_probe() during audio subsystem initialization. This is typically a local vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in kernel commits 282a4482e198e03781c152c88aac8aa382ef9a55 and 42b9ab7a4d7e6c5efd71847541e4fcc213585aad
Vendor Advisory: https://git.kernel.org/stable/c/282a4482e198e03781c152c88aac8aa382ef9a55
Restart Required: Yes
Instructions:
1. Update to a Linux kernel version containing the fix commits. 2. For distributions: apply kernel security updates from your vendor. 3. Reboot the system to load the patched kernel.
🔧 Temporary Workarounds
Disable affected audio driver
linuxPrevent loading of the vulnerable MediaTek ASoC driver module
echo 'blacklist snd-soc-mt8195' >> /etc/modprobe.d/blacklist.conf
rmmod snd-soc-mt8195
🧯 If You Can't Patch
- Ensure systems are not using MediaTek mt8195 hardware or disable the affected audio functionality
- Implement strict access controls to prevent unauthorized users from triggering audio subsystem operations
🔍 How to Verify
Check if Vulnerable:
Check if the system uses MediaTek mt8195 hardware and has the vulnerable kernel version: 'uname -r' and check kernel commit history for e70b8dd26711Check Version:
uname -rVerify Fix Applied:
Verify kernel version includes fix commits 282a4482e198e03781c152c88aac8aa382ef9a55 or 42b9ab7a4d7e6c5efd71847541e4fcc213585aad📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- KASAN out-of-bounds warnings in kernel logs
- Audio subsystem initialization failures
Network Indicators:
- None - this is a local kernel vulnerability
SIEM Query:
source="kernel" AND ("KASAN" OR "out-of-bounds" OR "mtk_soundcard_common_probe")