CVE-2025-38482
📋 TL;DR
This CVE describes an out-of-bounds bit shift vulnerability in the Linux kernel's comedi das6402 driver. An attacker with local access can trigger a kernel panic or potentially execute arbitrary code by providing a malicious IRQ number. Systems using the comedi driver for data acquisition hardware are affected.
💻 Affected Systems
- Linux kernel with comedi das6402 driver
📦 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 →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
Local privilege escalation to kernel mode, allowing complete system compromise and potential persistence mechanisms.
Likely Case
Kernel panic leading to denial of service (system crash) and potential data loss from interrupted operations.
If Mitigated
No impact if proper access controls prevent unprivileged users from accessing comedi devices.
🎯 Exploit Status
Requires local access and comedi device permissions. The vulnerability is in bounds checking logic, making exploitation more complex than simple buffer overflows.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions containing commits: 3eab654f5d199ecd45403c6588cda63e491fcfca, 4a3c18cde02e35aba87e0ad5672b3e1c72dda5a4, 70f2b28b5243df557f51c054c20058ae207baaac, 73f34d609397805c20d6b2ef5c07a4cbf7c4d63a, 8a3637027ceeba4ca5e500b23cb7d24c25592513
Vendor Advisory: https://git.kernel.org/stable/c/3eab654f5d199ecd45403c6588cda63e491fcfca
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version from your distribution vendor. 2. Reboot system to load new kernel. 3. Verify comedi driver is updated.
🔧 Temporary Workarounds
Disable comedi module
linuxPrevent loading of vulnerable comedi driver if not needed
echo 'blacklist comedi' >> /etc/modprobe.d/blacklist-comedi.conf
rmmod comedi
Restrict comedi device access
linuxLimit access to comedi devices to trusted users only
chmod 600 /dev/comedi*
chown root:root /dev/comedi*
🧯 If You Can't Patch
- Remove comedi driver if not required for system functionality
- Implement strict access controls to limit which users can access comedi devices
🔍 How to Verify
Check if Vulnerable:
Check if comedi module is loaded: lsmod | grep comedi. Check kernel version against patched versions.Check Version:
uname -rVerify Fix Applied:
Verify kernel version includes fix commits. Check that comedi driver loads without errors.📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- comedi driver crash logs
- segmentation faults in kernel space
Network Indicators:
- None - local vulnerability only
SIEM Query:
source="kernel" AND ("panic" OR "Oops" OR "comedi")🔗 References
- https://git.kernel.org/stable/c/3eab654f5d199ecd45403c6588cda63e491fcfca
- https://git.kernel.org/stable/c/4a3c18cde02e35aba87e0ad5672b3e1c72dda5a4
- https://git.kernel.org/stable/c/70f2b28b5243df557f51c054c20058ae207baaac
- https://git.kernel.org/stable/c/73f34d609397805c20d6b2ef5c07a4cbf7c4d63a
- https://git.kernel.org/stable/c/8a3637027ceeba4ca5e500b23cb7d24c25592513
- https://git.kernel.org/stable/c/a15e9c175f783298c4ee48146be6841335400406
- https://git.kernel.org/stable/c/a18a42e77545afcacd6a2b8d9fc16191b87454df
- https://git.kernel.org/stable/c/de8da1063cce9234d55c8270d9bdf4cf84411c80
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
