CVE-2021-1782: high-severity vulnerability in Apple macOS

A timing flaw in macOS and iOS allows a malicious app to gain elevated privileges by exploiting a race condition in the system's locking mechanism. This is dangerous because the app could bypass security restrictions and access sensitive system functions.

A race condition in a kernel or system service's locking implementation allows a local attacker to execute privileged operations out of intended order. The vulnerability requires running a malicious application on the target device; exploitation leads to privilege escalation and potential system compromise. Apple reported active exploitation in the wild.