CVE-2025-31278 in iOS
Summary
by MITRE • 07/30/2025
The issue was addressed with improved memory handling. This issue is fixed in iPadOS 17.7.9, watchOS 11.6, visionOS 2.6, iOS 18.6 and iPadOS 18.6, macOS Sequoia 15.6, tvOS 18.6. Processing maliciously crafted web content may lead to memory corruption.
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Analysis
by VulDB Data Team • 08/25/2025
This vulnerability represents a memory corruption issue that arises from insufficient memory handling mechanisms when processing maliciously crafted web content. The flaw exists in Apple's operating systems and affects multiple platforms including iOS, iPadOS, watchOS, visionOS, macOS, and tvOS. The vulnerability is classified as a memory handling issue that could potentially be exploited to cause system instability or arbitrary code execution. The root cause stems from inadequate validation and sanitization of web content that could trigger memory corruption during processing. This type of vulnerability typically falls under the CWE-122 category for buffer overflow conditions or CWE-787 for out-of-bounds write conditions that are commonly exploited in web-based attacks. The issue demonstrates how web content processing can expose underlying memory management weaknesses in operating system components.
The technical implementation of this vulnerability allows attackers to craft specific web content that when rendered by affected Apple operating systems triggers memory corruption. This corruption can occur through various mechanisms including heap overflow, stack corruption, or memory allocation errors that result from improper handling of user-supplied data. The exploitation pathway typically involves delivering malicious web content through compromised websites, email attachments, or other vector that renders web content within the affected operating systems. When the system processes this crafted content, the memory corruption can potentially lead to privilege escalation or system compromise. The fix implemented by Apple addresses these memory handling issues through enhanced input validation and improved memory management routines that prevent the corruption from occurring during web content processing.
The operational impact of this vulnerability extends beyond simple memory corruption to potentially enable more sophisticated attacks that could compromise user data and system integrity. Attackers could leverage this vulnerability to execute arbitrary code on affected devices, potentially gaining unauthorized access to sensitive information or system resources. The widespread nature of the affected platforms means that users across multiple Apple device categories could be at risk, including mobile devices, wearables, and desktop systems. This vulnerability aligns with ATT&CK technique T1203 for exploitation for privilege escalation and T1566 for social engineering through malicious content delivery. Organizations should consider this vulnerability as part of their broader threat landscape, particularly in environments where web browsing is prevalent and where device security is critical.
The mitigation strategy for this vulnerability centers on immediate deployment of the security updates provided by Apple. System administrators should prioritize updating all affected Apple devices to the patched versions including iOS 18.6, iPadOS 18.6, macOS Sequoia 15.6, tvOS 18.6, watchOS 11.6, and visionOS 2.6. Additionally, organizations should implement network monitoring to detect potential exploitation attempts through suspicious web content delivery. Security teams should consider implementing web filtering solutions that can block known malicious content and maintain awareness of emerging threats related to this vulnerability. The fix addresses fundamental memory handling issues that affect web rendering components, making it essential for all users to apply updates promptly. Regular security assessments should verify that systems have been properly updated and that no legacy components remain vulnerable to similar memory corruption issues.