Linux Kernel Vulnerability in tee_shm_put Affects System Stability

CVE-2025-39865

What is CVE-2025-39865?

A vulnerability in the Linux Kernel's memory management system was identified, specifically within the function tee_shm_put. A NULL pointer dereference occurred when invoked from the function tee_shm_free, leading to a potential system crash. This issue highlights the need for a validity check within tee_shm_put to prevent unsafe access and improve overall system reliability. The vulnerability arises when a pointer expected to reference a shared memory region returns NULL, triggering a crash upon dereference. Safeguarding against such scenarios is critical to maintain system performance and user experience.

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