CVE-2026-64758 in iOS
Summary
by MITRE • 07/28/2026
The issue was addressed with improved bounds checks. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. Processing a maliciously crafted file may lead to unexpected app termination.
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Analysis
by VulDB Data Team • 07/28/2026
This vulnerability represents a classic buffer overflow condition that was remediated through enhanced bounds checking mechanisms within the affected operating systems. The flaw existed in the file processing routines where insufficient validation of input data lengths allowed attackers to craft malicious files that could trigger memory corruption during parsing operations. When these specially crafted files were processed by applications running on the vulnerable versions, the system would encounter memory boundaries beyond allocated buffers, resulting in abrupt application termination and potential denial of service conditions. The vulnerability affects multiple Apple operating systems including iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS, indicating a widespread impact across the company's ecosystem. This type of issue typically falls under CWE-129 Input Validation and Output Conversion, specifically addressing improper bounds checking in memory operations. The remediation implemented through improved bounds checks aligns with defensive programming practices recommended by the Software Engineering Institute at Carnegie Mellon University and addresses fundamental security principles outlined in the OWASP Top Ten. The fix demonstrates a proper response to memory safety vulnerabilities that could be exploited by adversaries to disrupt normal system operations or potentially escalate privileges if combined with other exploit techniques. Security researchers have identified this as a critical issue affecting system stability, particularly given its potential for remote code execution through application crashes and memory corruption. The vulnerability classification aligns with ATT&CK technique T1499.004, which covers the exploitation of memory corruption vulnerabilities to achieve system compromise or service disruption.
The implementation of enhanced bounds checking represents a defensive programming approach that directly addresses the root cause of the vulnerability rather than merely patching symptoms. This remediation strategy prevents attackers from manipulating buffer boundaries through crafted input files and ensures that all memory access operations occur within properly allocated regions. The fix demonstrates proper software development lifecycle practices by incorporating runtime safeguards that validate data lengths before processing. Organizations should prioritize deployment of these updates across all affected systems to prevent potential exploitation attempts that could leverage this vulnerability for more sophisticated attacks. The vulnerability's impact extends beyond simple application crashes, as it could provide an entry point for attackers seeking to establish persistent access or escalate privileges within compromised systems. Security teams must monitor for indicators of compromise related to this vulnerability and ensure that all endpoints are updated to prevent exploitation attempts. The issue highlights the importance of regular security updates and the need for organizations to maintain robust patch management processes that can quickly deploy critical fixes across diverse operating environments.
The technical nature of this vulnerability underscores the ongoing challenges in memory safety within modern operating systems and applications. The fact that multiple Apple platforms were affected demonstrates how interconnected system components can share similar vulnerabilities, emphasizing the need for comprehensive security testing across entire software ecosystems rather than isolated components. This type of flaw typically requires deep understanding of memory management and buffer operations to both exploit and remediate effectively. The vulnerability's resolution through bounds checking improvements aligns with industry best practices established in various security frameworks including NIST SP 800-53 and ISO/IEC 27001. Security professionals should note that while this specific issue is addressed, similar vulnerabilities may exist in other software components requiring ongoing vigilance and comprehensive testing approaches. The remediation approach taken by Apple demonstrates proper incident response procedures where the focus was on strengthening core security controls rather than implementing workarounds or temporary fixes. Organizations can use this vulnerability as a case study for understanding how seemingly simple memory management issues can have significant operational impacts and require immediate attention to maintain system integrity and availability.