CVE-2021-39643

CVE-2021-39643 is a local escalation of privilege vulnerability affecting the Android kernel. It stems from a missing return value validation in the ic_startRetrieveEntryValue function, allowing a bypass of defense-in-depth mechanisms. With a CVSS score of 6.7 (Medium), exploitation requires System execution privileges and can lead to high impact on confidentiality, integrity, and availability, though user interaction is not needed. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.