Use After Free Vulnerability in Linux Kernel's ssi_protocol Driver

CVE-2025-37838

What is CVE-2025-37838?

The Linux kernel's ssi_protocol driver is susceptible to a use after free vulnerability caused by a race condition between the cleanup process and the execution of a work function. In particular, when the ssi_protocol_remove() function is invoked, it frees a memory structure (ssi) while another process may still reference it. This can result in unpredictable behavior or potential exploitation. The issue has been addressed by ensuring that any ongoing work is canceled prior to executing the cleanup process, thereby preserving system integrity.

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