CVE-2026-43744 in iOS
Summary
by MITRE • 07/28/2026
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. Processing an audio stream in a maliciously crafted media file may terminate the process.
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Analysis
by VulDB Data Team • 07/28/2026
This vulnerability represents a critical out-of-bounds write flaw that was successfully addressed through enhanced bounds checking mechanisms within Apple's multimedia processing frameworks. The issue manifests when the system processes audio streams contained within maliciously crafted media files, creating a scenario where memory corruption can occur during normal playback operations. Such vulnerabilities typically arise from insufficient validation of input data boundaries, allowing attackers to manipulate memory locations beyond allocated buffers through carefully constructed media content.
The technical implementation of this flaw involves improper bounds checking during audio stream parsing and processing operations within Apple's multimedia frameworks. When encountering malformed audio data in media files, the system fails to adequately verify buffer limits before writing data to memory locations, potentially overwriting adjacent memory regions with arbitrary values. This type of vulnerability falls under the common weakness enumeration CWE-787, which specifically addresses out-of-bounds write conditions that can lead to arbitrary code execution or process termination.
The operational impact of this vulnerability extends beyond simple process termination, as it represents a potential vector for privilege escalation and system compromise within Apple's ecosystem. Attackers could craft specially designed media files that, when played through legitimate applications, would trigger the out-of-bounds write condition and potentially execute malicious code within the context of the affected application. This aligns with attack patterns documented in the MITRE ATT&CK framework under technique T1203, which covers exploitation of software vulnerabilities for privilege escalation.
Security professionals should note that this vulnerability affects multiple Apple operating systems including iOS, iPadOS, macOS across various versions, tvOS, visionOS, and watchOS, indicating a widespread impact within the Apple ecosystem. The mitigation strategy involves deploying the specified updates to iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, and watchOS 26.6, which implement enhanced bounds checking mechanisms to prevent the memory corruption scenario. Organizations should prioritize immediate deployment of these security patches across all affected devices and monitor for any suspicious activity that might indicate exploitation attempts. The fix demonstrates Apple's proactive approach to vulnerability remediation through improved input validation and memory management practices that align with industry best practices for preventing buffer overflow conditions.