CVE-2024-43825
📋 TL;DR
A Linux kernel vulnerability in the iio subsystem's iio_gts_build_avail_time_table function allows out-of-bounds memory writes when processing zero time values. This affects systems using Industrial I/O (IIO) subsystems, potentially leading to kernel crashes or privilege escalation. All Linux systems with vulnerable kernel versions are affected.
💻 Affected Systems
- Linux kernel
📦 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 →⚠️ Risk & Real-World Impact
Worst Case
Kernel panic, system crash, or local privilege escalation leading to full system compromise.
Likely Case
Kernel crash or system instability when IIO devices with zero time values are accessed.
If Mitigated
Minimal impact if IIO subsystem is not used or proper kernel hardening is in place.
🎯 Exploit Status
Requires local access and interaction with IIO devices. Exploitation depends on specific hardware configuration.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patched in stable kernel commits: 31ff8464ef540785344994986a010031410f9ff3, 5acc3f971a01be48d5ff4252d8f9cdb87998cdfb, b5046de32fd1532c3f67065197fc1da82f0b5193
Vendor Advisory: https://git.kernel.org/stable/c/31ff8464ef540785344994986a010031410f9ff3
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version. 2. Check distribution-specific security advisories. 3. Reboot system after kernel update.
🔧 Temporary Workarounds
Disable IIO subsystem
linuxRemove or disable Industrial I/O subsystem if not needed
modprobe -r iio
echo 'blacklist iio' >> /etc/modprobe.d/blacklist.conf
🧯 If You Can't Patch
- Restrict access to IIO device files to trusted users only
- Implement kernel hardening features like SELinux/AppArmor to limit impact
🔍 How to Verify
Check if Vulnerable:
Check kernel version and verify if IIO subsystem is loaded: lsmod | grep iioCheck Version:
uname -rVerify Fix Applied:
Verify kernel version includes patched commits or check with distribution security tools📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- Out-of-bounds memory access errors in kernel logs
- IIO subsystem crash logs
Network Indicators:
- None - local vulnerability only
SIEM Query:
source="kernel" AND ("panic" OR "oops" OR "segfault") AND "iio"