A memory corruption vulnerability was addressed with improved locking. This issue is fixed in macOS Monterey 12.5, macOS Big Sur 11.6.8, Security Update 2022-005 Catalina. An app may be able to execute arbitrary code with kernel privileges.
The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mac_os_x | Apple | 10.15.7-security_update_2020-001 (including) | 10.15.7-security_update_2020-001 (including) |
| Mac_os_x | Apple | 10.15.7-security_update_2021-001 (including) | 10.15.7-security_update_2021-001 (including) |
| Mac_os_x | Apple | 10.15.7-security_update_2021-002 (including) | 10.15.7-security_update_2021-002 (including) |
| Mac_os_x | Apple | 10.15.7-security_update_2021-003 (including) | 10.15.7-security_update_2021-003 (including) |
| Mac_os_x | Apple | 10.15.7-security_update_2021-004 (including) | 10.15.7-security_update_2021-004 (including) |
| Mac_os_x | Apple | 10.15.7-security_update_2021-005 (including) | 10.15.7-security_update_2021-005 (including) |
| Mac_os_x | Apple | 10.15.7-security_update_2021-006 (including) | 10.15.7-security_update_2021-006 (including) |
| Mac_os_x | Apple | 10.15.7-security_update_2021-007 (including) | 10.15.7-security_update_2021-007 (including) |
| Mac_os_x | Apple | 10.15.7-security_update_2021-008 (including) | 10.15.7-security_update_2021-008 (including) |
| Mac_os_x | Apple | 10.15.7-security_update_2022-001 (including) | 10.15.7-security_update_2022-001 (including) |
| Mac_os_x | Apple | 10.15.7-security_update_2022-002 (including) | 10.15.7-security_update_2022-002 (including) |
| Mac_os_x | Apple | 10.15.7-security_update_2022-003 (including) | 10.15.7-security_update_2022-003 (including) |
| Macos | Apple | * | 10.15.7 (excluding) |
| Macos | Apple | 11.0 (including) | 11.6.8 (excluding) |
| Macos | Apple | 12.0 (including) | 12.5 (excluding) |
| Macos | Apple | 10.15.7 (including) | 10.15.7 (including) |
| Macos | Apple | 10.15.7-security_update_2022-004 (including) | 10.15.7-security_update_2022-004 (including) |
Locking is a type of synchronization behavior that ensures that multiple independently-operating processes or threads do not interfere with each other when accessing the same resource. All processes/threads are expected to follow the same steps for locking. If these steps are not followed precisely - or if no locking is done at all - then another process/thread could modify the shared resource in a way that is not visible or predictable to the original process. This can lead to data or memory corruption, denial of service, etc.