CVE-2021-39675

CVE-2021-39675 is a critical heap buffer overflow vulnerability in the GKI_getbuf function of gki_buffer.cc, affecting Android 12. This flaw allows for remote escalation of privilege without requiring user interaction or additional execution privileges. With a CVSS score of 9.8 (CRITICAL), it poses a significant risk due to its network-based attack vector and low attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered substantial community discussion and media coverage, indicating high awareness despite its inactive status on the CISA KEV catalog.