Race Condition in TEE Subsystem Leads to Use-After-Free Vulnerability in Linux Kernel

Race Condition in TEE Subsystem Leads to Use-After-Free Vulnerability in Linux Kernel

CVE-2021-44733 · HIGH Severity

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

A use-after-free exists in drivers/tee/tee_shm.c in the TEE subsystem in the Linux kernel through 5.15.11. This occurs because of a race condition in tee_shm_get_from_id during an attempt to free a shared memory object.

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