CVE-2021-46795 (cezannepi-fp6_firmware, comboam4v2_pi_firmware, renoirpi-fp6_firmware)

A TOCTOU (time-of-check to time-of-use) vulnerability exists where an attacker may use a compromised BIOS to cause the TEE OS to read memory out of bounds that could potentially result in a denial of service.

bios check compromised cve denial of service may memory result service toctou vulnerability