Linux Kernel Memory Management Vulnerability Affecting System Stability

CVE-2025-21833

What is CVE-2025-21833?

A vulnerability has been identified in the Linux kernel that involves improper handling of a NULL pointer in the iommu/vt-d subsystem. Specifically, when the domain_remove_dev_pasid function cannot locate the pasid, the system had the potential to execute operations on a NULL pointer, which could lead to unpredictable behavior or system crashes. It is crucial to apply the necessary patches to maintain system stability and security.

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