CVE-2025-24222 is a vulnerability identified in Apple macOS that arises from improper memory handling when processing web content. Specifically, it is categorized under CWE-119, indicating a buffer-related memory safety issue. When a user processes maliciously crafted web content—such as visiting a compromised or malicious website—the vulnerability may trigger an unexpected process crash. This crash results from the system failing to correctly manage memory boundaries, leading to instability in affected processes. The vulnerability requires no privileges (AV:N), has low attack complexity (AC:L), does not require authentication (PR:N), but does require user interaction (UI:R), such as opening or interacting with malicious web content. The scope is unchanged (S:U), and the impact is limited to availability (A:H), with no confidentiality or integrity impact. The CVSS 3.1 base score is 6.5, reflecting a medium severity level. Apple addressed this issue in macOS Sequoia 15.5 by improving memory handling mechanisms to prevent such crashes. There are no known exploits in the wild at this time, but the vulnerability could be exploited to cause denial of service conditions by crashing processes critical to system or application stability. Given the widespread use of macOS in enterprise and consumer environments, especially in sectors relying heavily on web-based applications, this vulnerability represents a tangible risk if left unpatched.

The primary impact of CVE-2025-24222 is denial of service through unexpected process crashes on affected macOS systems. This can disrupt user productivity, cause application instability, and potentially impact critical services running on macOS devices. While the vulnerability does not directly compromise confidentiality or integrity, repeated crashes could lead to system downtime or loss of availability for important applications. Organizations with macOS endpoints exposed to web content—such as employees browsing the internet or accessing web-based tools—are at risk of service interruptions. In environments where macOS is used for development, creative work, or critical business functions, such disruptions could have operational and financial consequences. Additionally, attackers could leverage this vulnerability as part of a broader attack chain to degrade system reliability or distract defenders. Although no active exploitation is reported, the ease of triggering the crash via crafted web content and the lack of required privileges make timely patching essential to minimize risk.

1. Apply the macOS Sequoia 15.5 update immediately on all affected systems to ensure the vulnerability is patched. 2. Implement web content filtering and network security controls to block access to known malicious websites or suspicious web content that could exploit this vulnerability. 3. Educate users about the risks of interacting with untrusted web content and encourage cautious browsing habits. 4. Employ endpoint protection solutions capable of detecting anomalous process crashes or exploitation attempts related to memory corruption. 5. Use sandboxing and application isolation techniques to limit the impact of any process crashes caused by malicious content. 6. Monitor system and application logs for unusual crashes or instability that could indicate attempted exploitation. 7. For organizations with macOS devices in critical roles, consider restricting web browsing capabilities or using managed browsing environments to reduce exposure. 8. Maintain regular backups and incident response plans to quickly recover from potential denial of service incidents.