A race condition was addressed with additional validation. This issue is fixed in macOS Big Sur 11.2.1, macOS Catalina 10.15.7 Supplemental Update, macOS Mojave 10.14.6 Security Update 2021-002. An application may be able to execute arbitrary code with kernel privileges.
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.
Link | Tags |
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https://support.apple.com/en-us/HT212177 | vendor advisory |
https://support.apple.com/kb/HT212327 | vendor advisory |
http://seclists.org/fulldisclosure/2021/Apr/54 | third party advisory mailing list |