CVE-2017-9984

CVE-2017-9984 is a denial-of-service vulnerability affecting the Linux kernel through version 4.11.7, specifically within the snd_msnd_interrupt function. It allows a local attacker to cause a system crash or potentially other unspecified impacts due to an over-boundary access, stemming from a "double fetch" issue where a message queue head pointer's value can be altered between two kernel reads. With a CVSS score of 7.8 (High), this vulnerability has a low attack complexity and requires local user privileges, but can lead to high impact on confidentiality, integrity, and availability. There is no evidence of active exploitation, nor are there any public exploits available in Metasploit, Nuclei, or ExploitDB, and it has received minimal community discussion or media coverage.