CVE-2016-6516

CVE-2016-6516 describes a race condition, specifically a "double fetch" vulnerability, within the ioctl_file_dedupe_range function in the Linux kernel through version 4.7. This flaw allows a local attacker to trigger a heap-based buffer overflow, leading to a denial of service or potentially privilege escalation. The vulnerability is rated as High severity with a CVSS score of 7.4, indicating that while local access and high attack complexity are required, the potential impact on confidentiality, integrity, and availability is significant. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.