CVE-2026-64772: Apple iPadOS Buffer Overflow Vulnerability

CVE-2026-64772 Overview

CVE-2026-64772 is an out-of-bounds write vulnerability [CWE-787] affecting multiple Apple operating systems. A remote attacker can trigger the flaw over the network without authentication or user interaction. Successful exploitation leads to unexpected application termination or heap corruption, which can be leveraged for arbitrary code execution. Apple addressed the issue through improved input validation in iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6, tvOS 26.6, and visionOS 26.6.

Critical Impact
A remote, unauthenticated attacker can corrupt heap memory across Apple's operating system ecosystem, enabling application crashes and potential arbitrary code execution.

Affected Products

Apple iOS and iPadOS prior to 26.6
Apple macOS Sequoia prior to 15.7.8 and macOS Tahoe prior to 26.6
Apple tvOS prior to 26.6 and visionOS prior to 26.6

Discovery Timeline

2026-07-27 - CVE-2026-64772 published to NVD
2026-07-29 - Last updated in NVD database

Technical Details for CVE-2026-64772

Vulnerability Analysis

CVE-2026-64772 is an out-of-bounds write flaw in a component shared across Apple's operating system family. The affected code writes data beyond the bounds of an allocated buffer when processing attacker-controlled input received over the network. Because the write occurs on the heap, corruption of adjacent allocations, metadata, or function pointers becomes possible.

Apple's advisories describe the impact as unexpected application termination or heap corruption. In practice, out-of-bounds writes of this class have historically been chained with information leaks to bypass Address Space Layout Randomization (ASLR) and achieve remote code execution.

Root Cause

The underlying defect is insufficient input validation prior to a memory write operation. When the affected component parses a malformed or oversized network-supplied structure, size or index checks fail to constrain the write target. Apple's fix introduces improved input validation to reject or bound the offending values before memory access occurs.

Attack Vector

Exploitation is remote and requires no privileges or user interaction. An attacker delivers a crafted payload to a vulnerable Apple device over the network. Processing the payload triggers the out-of-bounds write, leading to a crash or controlled heap corruption. No public proof-of-concept exploit or CISA KEV listing exists for this CVE at time of writing.

Detailed technical write-ups are not published in the referenced Apple advisories. See the Apple security advisories linked in the vendor references for component-specific detail as it becomes available: Apple Security Advisory #128066, #128067, #128069, #128070, and #128071.

Detection Methods for CVE-2026-64772

Indicators of Compromise

Repeated unexpected termination or crash reports for network-facing services and applications on Apple devices.
Diagnostic reports referencing heap corruption, EXC_BAD_ACCESS, or abort traps in system logs.
Anomalous inbound network traffic to Apple endpoints followed by process restarts or kernel panics.

Detection Strategies

Collect and centralize crash logs from macOS (~/Library/Logs/DiagnosticReports/) and mobile device management (MDM) telemetry for iOS, iPadOS, tvOS, and visionOS devices.
Correlate crash timestamps with network flow data to identify sources of malicious payloads.
Track OS build versions across the fleet and flag devices still running versions prior to the fixed builds.

Monitoring Recommendations

Ingest endpoint telemetry, crash reports, and MDM inventory into a centralized analytics platform for correlation.
Alert on repeated crashes of the same process across multiple devices within a short time window.
Monitor network-facing services on Apple hosts for unusual protocol payload sizes or malformed structures.

How to Mitigate CVE-2026-64772

Immediate Actions Required

Update all Apple devices to iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6, tvOS 26.6, or visionOS 26.6.
Enforce patch compliance through MDM and block non-compliant devices from sensitive network segments.
Prioritize internet-exposed and executive-tier devices for immediate remediation.

Patch Information

Apple released fixes in iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6, tvOS 26.6, and visionOS 26.6. The fix consists of improved input validation on the affected code path. Refer to Apple Security Advisory #128066, #128067, #128069, #128070, and #128071 for build-specific details.

Workarounds

No vendor-provided workaround exists; patching is the only supported remediation.
Restrict network exposure of vulnerable devices via firewall rules or network segmentation until patches are applied.
Disable or limit network-facing services on affected endpoints where operationally feasible.

bash

# Verify current macOS version and apply available updates
sw_vers -productVersion
sudo softwareupdate --install --all --restart