Listen to this Post
The CVE-2025-37900 vulnerability exists within the `iommu_copy_struct_from_user()` function in the Linux kernel. This function is responsible for safely copying a data structure from user space into kernel space. The flaw involves two primary issues. First, the function fails to perform an initial check to reject a NULL pointer from the user before it is dereferenced. If a user passes a NULL pointer, the kernel attempts to access this invalid memory location. Second, there is a typo in the code that could potentially affect the robustness of the copy operation. When triggered, the NULL pointer dereference leads to a kernel oops, causing a denial-of-service by crashing the kernel. This vulnerability stems from an oversight in the initial implementation where proper pointer validation was omitted, creating an instability vector.
Platform: Linux Kernel
Version: Affected versions
Vulnerability: NULL Pointer Dereference
Severity: Medium
date: 2025-05-20
Prediction: Patch expected 2025-06-10
What Undercode Say:
`cat /proc/version`
`dmesg | grep -i “oops”`
`grep -r “iommu_copy_struct_from_user” /usr/src/linux-headers-/`
How Exploit:
Malicious userspace application.
Calls IOCTL with NULL.
Triggers kernel oops/crash.
Protection from this CVE
Update kernel version.
Apply security patch.
Input validation in kernel.
Impact:
Kernel panic.
Denial-of-Service.
System instability.
🎯Let’s Practice Exploiting & Learn Patching For Free:
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
