The vulnerability in Google Chrome was used in a targeted attack along with another zero-day in Microsoft Windows.
The initial attack was detected in late February.
Vulnerable component: Google Chrome
CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C
CWE-ID: CWE-416 - Use After Free
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in FileReader. A remote attacker can trick the victim into opening a specially crafted file with Google Chrome, trigger use-after-free error and execute arbitrary code on the target system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Note: the vulnerability is being exploited in the wild.