CVE-2026-64768 Overview
CVE-2026-64768 is an out-of-bounds read vulnerability affecting multiple Apple operating systems, including iOS, iPadOS, macOS, tvOS, and visionOS. The flaw stems from insufficient input validation and is tracked under CWE-125. A remote attacker can trigger the condition by delivering crafted content that requires user interaction, resulting in unexpected application termination. Apple resolved the issue by adding improved input validation across affected platforms.
Critical Impact
A remote attacker can cause unexpected application termination on affected Apple devices when a user interacts with malicious content, disrupting device availability.
Affected Products
- Apple iOS and iPadOS (fixed in 26.6)
- Apple macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6
- Apple tvOS 26.6 and visionOS 26.6
Discovery Timeline
- 2026-07-27 - CVE-2026-64768 published to the National Vulnerability Database (NVD)
- 2026-07-28 - Last updated in NVD database
Technical Details for CVE-2026-64768
Vulnerability Analysis
CVE-2026-64768 is an out-of-bounds read defect in a component shared across Apple's operating system family. The vulnerability occurs when the affected code path processes untrusted input without adequately validating buffer boundaries. During parsing, the code reads memory outside the allocated buffer, leading to unexpected process termination.
Exploitation requires user interaction, such as opening a crafted file or visiting attacker-controlled content. Successful triggering does not grant code execution but disrupts availability by terminating the affected application. The impact scope is limited to the process handling the malformed input.
Root Cause
The root cause is improper input validation within a parser or data-handling routine in the affected Apple frameworks. When the routine processes malformed structures, it fails to enforce the expected length or offset boundaries. The result is a read past the end of an allocated memory region, classified under CWE-125: Out-of-bounds Read.
Attack Vector
The attack vector is network-based and requires user interaction. An attacker crafts malformed content designed to trigger the parsing flaw. When the target user opens or renders that content on a vulnerable Apple device, the affected process terminates unexpectedly. Apple has not disclosed active exploitation, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
Detailed technical specifics are documented in the Apple Security Advisory #128066 and related advisories linked below.
Detection Methods for CVE-2026-64768
Indicators of Compromise
- Unexpected or repeated crashes of applications on iOS, iPadOS, macOS, tvOS, or visionOS devices running pre-patch versions.
- Crash logs in ~/Library/Logs/DiagnosticReports/ on macOS referencing out-of-bounds memory access in system frameworks.
- Delivery of unsolicited files, links, or messages that immediately cause an application to terminate upon opening.
Detection Strategies
- Collect and centralize Apple device crash reports and correlate repeated terminations across users to identify suspicious content-driven crashes.
- Inspect email gateways, messaging platforms, and web proxies for crafted file attachments or URLs delivered to Apple endpoints.
- Monitor endpoint telemetry for abnormal application termination events tied to specific file types or network-delivered content.
Monitoring Recommendations
- Track OS version compliance to identify Apple endpoints still running versions below iOS/iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, or visionOS 26.6.
- Alert on clusters of crash events targeting the same application across multiple users, which may indicate an active campaign.
- Review network logs for suspicious inbound content that coincides with reported crashes on Apple devices.
How to Mitigate CVE-2026-64768
Immediate Actions Required
- Update all Apple devices to the fixed versions: iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, and visionOS 26.6.
- Prioritize patching for user-facing endpoints that process untrusted content such as email, messages, and web pages.
- Advise users to avoid opening unexpected attachments or clicking links from untrusted sources until patches are applied.
Patch Information
Apple has released fixes across its operating system portfolio. Refer to the vendor advisories for platform-specific update instructions: Apple Security Advisory #128066, Apple Security Advisory #128067, Apple Security Advisory #128069, Apple Security Advisory #128070, Apple Security Advisory #128071, and Apple Security Advisory #128072.
Workarounds
- No official vendor workaround is documented; applying the security update is the recommended remediation.
- Enforce mobile device management (MDM) policies to accelerate deployment of the required OS versions across managed fleets.
- Restrict delivery of unsolicited content through email, messaging, and web filtering controls until all endpoints are patched.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
