Vulnerable component: Windows
CVSSv3 score: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/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 user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the ws2ifsl.sys (Winsock). A local user can run a specially crafted application, trigger memory corruption and execute arbitrary code on the target system with elevated privileges.
Note, this vulnerability is being actively exploited in the wild.