According to Ben Hawkes, team leader at Project Zero, the vulnerability has been exploited in the wild as 0day.
Vulnerable component: Apple iOS
CVSSv3 score: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C
CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
The vulnerability allows a local attacker to gain elevated privileges.
The weakness exists due to a boundary error in the IOKit component when handling malicious input. A local attacker can run a specially crafted application, trigger memory corruption and execute arbitrary code with elevated privileges.
Successful exploitation of the vulnerability may result in system compromise.
Note: according to Ben Hawkes, team leader at Project Zero, the vulnerability has been exploited in the wild as 0day.