CVE-2024-44244 is a memory corruption vulnerability identified in Apple Safari and related Apple operating systems, including iOS, iPadOS, macOS Sequoia, tvOS, visionOS, and watchOS. The root cause is insufficient input validation when processing web content, which can lead to memory corruption and subsequently cause the Safari process to crash unexpectedly. This vulnerability is classified under CWE-787 (Out-of-bounds Write), indicating that crafted input can cause the program to write outside the bounds of allocated memory. The flaw requires no privileges or authentication but does require user interaction, specifically the user visiting a maliciously crafted web page. The CVSS v3.1 base score is 4.3, reflecting a medium severity level primarily due to the impact being limited to availability (denial of service) without affecting confidentiality or integrity. Apple has fixed this issue in Safari 18.1 and corresponding OS versions released in late 2024 by improving input validation mechanisms to prevent memory corruption. There are currently no known exploits in the wild, but the vulnerability could be used by attackers to disrupt user sessions or cause denial-of-service conditions on Apple devices running vulnerable versions of Safari or related OS components. The vulnerability affects a broad range of Apple platforms, indicating a wide attack surface for users of Apple’s ecosystem.

The primary impact of CVE-2024-44244 is denial of service through unexpected process crashes of Safari and related Apple platform browsers. This can disrupt user productivity, cause loss of unsaved data in browser sessions, and degrade user experience. For organizations relying heavily on Apple devices and Safari for web access, this could lead to operational interruptions. Although the vulnerability does not directly compromise confidentiality or integrity, repeated crashes could be leveraged in targeted attacks to degrade system availability or as part of multi-stage attacks. The lack of required privileges or authentication lowers the barrier for exploitation, but user interaction is necessary, limiting automated exploitation. The broad range of affected Apple platforms increases the potential scope of impact globally, especially in environments with mixed Apple device usage. No known active exploits reduce immediate risk, but the vulnerability should be treated seriously due to the potential for denial-of-service attacks and the widespread use of Apple products in both consumer and enterprise environments.

Organizations and users should immediately update all affected Apple products to the patched versions: Safari 18.1, iOS 18.1, iPadOS 18.1, macOS Sequoia 15.1, tvOS 18.1, visionOS 2.1, and watchOS 11.1. Beyond patching, network-level protections such as web content filtering and URL reputation services can help reduce exposure by blocking access to known malicious sites. Employing endpoint security solutions that monitor for abnormal process crashes or unusual browser behavior can aid in early detection of exploitation attempts. User education to avoid clicking on suspicious links or visiting untrusted websites is critical since exploitation requires user interaction. Organizations should also consider implementing application sandboxing and process isolation features available in Apple platforms to limit the impact of crashes. Regularly reviewing browser crash logs and telemetry can help identify potential exploitation attempts. Finally, maintaining an up-to-date inventory of Apple devices and their OS versions will ensure timely patch deployment and risk management.