CVE-2025-37900 addresses two issues in the Linux kernel's iommu_copy_struct_from_user() function. The vulnerabilities involve improper handling of NULL pointers and a typographical error, which were identified during a review of a related helper function. These issues could lead to a denial of service (DoS) due to kernel crashes. The vulnerability has a medium severity rating with a CVSS score of 5.5. No specific affected versions are stated, and no public exploits or known in-the-wild exploitation have been reported.