CVE-2024-27811 is a vulnerability in Apple operating systems (iOS, iPadOS, macOS Sonoma) that could allow a malicious app to elevate its privileges improperly. The root cause is insufficient validation or checks in the affected components, classified under CWE-269 (Improper Privilege Management). Apple fixed this issue by implementing improved checks in the security updates released in May 2024 (iOS 17.5, iPadOS 17.5, macOS Sonoma 14.5). The vulnerability has a CVSS 3.1 base score of 9.1, reflecting its critical nature with network attack vector and no required privileges or user interaction, potentially leading to high confidentiality and integrity impacts.

An attacker who can run a malicious app on a vulnerable device may exploit this vulnerability to elevate privileges, potentially gaining unauthorized access to sensitive system functions or data. This could compromise the confidentiality and integrity of the affected system. There are no reports of active exploitation in the wild. The vulnerability affects a wide range of Apple devices running the affected OS versions prior to the patched releases.

Apple has released official patches that address this vulnerability in iOS 17.5, iPadOS 17.5, and macOS Sonoma 14.5. Users and administrators should apply these updates promptly to mitigate the risk. Since this is not a cloud service, remediation depends on updating the affected devices. There are no vendor advisories indicating that no action is required or that the issue is already mitigated without patching. Patch status is confirmed as fixed in the specified OS versions.