Inappropriate symlink handling and a race condition in the stateful recovery feature implementation could lead to a persistance established by a malicious code running with root privileges in cryptohomed in Google Chrome on Chrome OS prior to 61.0.3163.113 allowed a local attacker to execute arbitrary code via a crafted HTML page.
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.