CVE-2024-43877
📋 TL;DR
This CVE describes an out-of-bounds memory access vulnerability in the Linux kernel's IVTV media driver. When DMA mapping fails, the driver attempts to access an invalid array index, potentially causing kernel crashes or memory corruption. This affects Linux systems using the IVTV driver for video capture cards.
💻 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 →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, potential privilege escalation, or arbitrary code execution in kernel context.
Likely Case
System instability, kernel crashes, or denial of service affecting media functionality.
If Mitigated
Limited impact with proper kernel hardening and restricted user access to affected devices.
🎯 Exploit Status
Requires local access and ability to trigger DMA failures in the IVTV driver.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions containing commits 24062aa7407091dee3e45a8e8037df437e848718 or later
Vendor Advisory: https://git.kernel.org/stable/c/24062aa7407091dee3e45a8e8037df437e848718
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version from your distribution's repositories. 2. Reboot system to load new kernel.
🔧 Temporary Workarounds
Disable IVTV module
linuxPrevent loading of the vulnerable IVTV driver module
echo 'blacklist ivtv' >> /etc/modprobe.d/blacklist-ivtv.conf
rmmod ivtv
🧯 If You Can't Patch
- Restrict access to IVTV devices to trusted users only
- Implement kernel hardening features like KASLR and stack protection
🔍 How to Verify
Check if Vulnerable:
Check if IVTV module is loaded: lsmod | grep ivtv. If loaded, check kernel version against patched versions.Check Version:
uname -rVerify Fix Applied:
Verify kernel version includes fix commits or is newer than vulnerable versions. Check dmesg for IVTV-related errors.📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- IVTV driver errors in dmesg
- Out of bounds access warnings
Network Indicators:
- None - local vulnerability only
SIEM Query:
source="kernel" AND ("ivtv" OR "out of bounds" OR "kernel panic")🔗 References
- https://git.kernel.org/stable/c/24062aa7407091dee3e45a8e8037df437e848718
- https://git.kernel.org/stable/c/38f72c7e7c6b55614f9407555fd5ce9d019b0fa4
- https://git.kernel.org/stable/c/3d8fd92939e21ff0d45100ab208f8124af79402a
- https://git.kernel.org/stable/c/629913d6d79508b166c66e07e4857e20233d85a9
- https://git.kernel.org/stable/c/81d0664bed91a858c7b50c263954b59d65f1b414
- https://git.kernel.org/stable/c/c766065e8272085ea9c436414b7ddf1f12e7787b
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
