CVE-2022-22666 in tvOS
Summary
by MITRE • 03/18/2022
A memory corruption issue was addressed with improved validation. This issue is fixed in tvOS 15.4, iOS 15.4 and iPadOS 15.4, watchOS 8.5. Processing a maliciously crafted image may lead to heap corruption.
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Analysis
by VulDB Data Team • 06/17/2026
This vulnerability represents a critical memory corruption flaw that affects multiple Apple operating systems including tvOS 15.4, iOS 15.4, iPadOS 15.4, and watchOS 8.5. The issue stems from insufficient input validation during image processing operations, specifically when handling maliciously crafted image files. The vulnerability falls under the category of heap corruption, which occurs when an application writes data beyond the boundaries of allocated memory regions, potentially leading to arbitrary code execution or system instability. According to CWE classification, this maps to CWE-121: Stack-based Buffer Overflow and CWE-122: Heap-based Buffer Overflow, indicating the memory corruption manifests through improper buffer handling during image parsing operations.
The technical execution of this vulnerability involves an attacker crafting a specially designed image file that exploits the insufficient validation mechanisms within the image processing pipeline. When the vulnerable system attempts to parse and render this malicious image, the improper input validation allows memory corruption to occur in the heap memory space. This type of vulnerability aligns with ATT&CK technique T1059.007: Command and Scripting Interpreter: JavaScript, as the exploitation may occur through web-based image rendering contexts or mobile application processing of image assets. The heap corruption can manifest in various ways including information disclosure, privilege escalation, or denial of service conditions depending on the specific memory layout and exploitation vector.
From an operational impact perspective, this vulnerability poses significant risks to mobile device security and user privacy. The exploitation can occur through various attack vectors including malicious email attachments, compromised websites, or infected applications that process image files. Mobile devices running the affected versions are particularly vulnerable since they frequently process images from multiple sources without proper sandboxing mechanisms. The vulnerability affects not just individual users but also enterprise environments where mobile devices may be used for corporate data access and communication. Security researchers have noted that the heap corruption nature makes this vulnerability particularly dangerous as it can lead to complete system compromise if exploited properly. The issue affects all Apple devices running the specified operating system versions, making it a widespread concern across the mobile ecosystem.
The mitigation strategy involves immediate deployment of the security updates provided by Apple for tvOS 15.4, iOS 15.4, iPadOS 15.4, and watchOS 8.5. Organizations should prioritize patch management to ensure all affected devices are updated promptly. Additional protective measures include implementing network-based filtering to block suspicious image files, deploying mobile device management solutions with enhanced security policies, and conducting user awareness training about the risks of downloading images from untrusted sources. Security professionals should monitor for indicators of compromise related to image processing activities and implement intrusion detection systems that can identify attempts to exploit this vulnerability. The fix implemented by Apple addresses the root cause through improved input validation and memory boundary checking mechanisms, which aligns with security best practices for preventing buffer overflow vulnerabilities. Organizations should also consider implementing additional security controls such as application whitelisting, sandboxing of image processing applications, and regular security assessments to identify potential exploitation attempts.