CVE-2026-43780 Overview
CVE-2026-43780 is an integer overflow vulnerability [CWE-190] affecting texture processing across Apple's operating system portfolio. Processing a maliciously crafted texture may lead to unexpected app termination. Apple addressed the flaw with improved input validation across iOS, iPadOS, macOS, tvOS, visionOS, and watchOS. The vulnerability requires local access and user interaction, and its impact spans confidentiality, integrity, and availability.
Critical Impact
A local attacker can trigger memory corruption via a crafted texture file, resulting in application termination and potential exploitation for code execution within the affected process context.
Affected Products
- Apple iOS and iPadOS (fixed in 26.6)
- Apple macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6
- Apple tvOS 26.6, visionOS 26.6, watchOS 26.6
Discovery Timeline
- 2026-07-27 - CVE-2026-43780 published to the National Vulnerability Database
- 2026-07-28 - Last updated in NVD database
Technical Details for CVE-2026-43780
Vulnerability Analysis
The vulnerability originates in Apple's texture processing code path used by graphics and media components across its operating systems. An integer overflow occurs when the affected routine calculates buffer sizes or offsets from attacker-controlled texture metadata. When the arithmetic wraps around, subsequent memory operations reference undersized or misaligned buffers.
The resulting out-of-bounds access causes unexpected application termination. Apple's advisory notes the issue was resolved by adding input validation on texture-related size fields before allocation and indexing operations proceed.
Root Cause
The root cause is missing bounds checking on integer values parsed from texture data [CWE-190]. Untrusted numeric fields participate in size calculations without validation against overflow limits. The fix introduces explicit input validation before values are used in memory arithmetic.
Attack Vector
Exploitation requires local access and user interaction. An attacker delivers a maliciously crafted texture file, likely via an application that renders or previews graphical content. Opening or processing the texture triggers the overflow. The scope remains unchanged, but confidentiality, integrity, and availability impacts are all high, indicating the affected process may be manipulated beyond a simple crash.
See the Apple Security Advisory #128066 for platform-specific technical notes.
Detection Methods for CVE-2026-43780
Indicators of Compromise
- Repeated crashes of graphics-consuming applications shortly after opening a texture, image, or 3D asset file from an untrusted source.
- Crash reports referencing texture parsing routines or Metal/Core Graphics frames with arithmetic overflow signatures.
- Delivery of unusual texture file formats or archive attachments to endpoints running unpatched Apple OS versions.
Detection Strategies
- Monitor endpoint telemetry for abnormal termination of applications that handle graphical or model content on Apple devices.
- Correlate file download events for texture, image, and 3D asset formats with subsequent process crashes on the same host.
- Track OS build and version inventory to identify endpoints still running pre-patch releases of iOS, iPadOS, macOS, tvOS, visionOS, or watchOS.
Monitoring Recommendations
- Ingest macOS unified logs and crash reports into a centralized analytics platform to identify recurring texture-related faults.
- Alert on unexpected child process spawns following renderer crashes, which may indicate exploitation beyond simple denial of service.
- Baseline patch compliance for Apple endpoints and generate alerts when devices fall behind the fixed OS versions.
How to Mitigate CVE-2026-43780
Immediate Actions Required
- Update Apple endpoints 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, or watchOS 26.6.
- Prioritize devices used to open externally sourced texture, image, and 3D asset files.
- Instruct users to avoid opening untrusted texture or graphical asset files until patches are deployed.
Patch Information
Apple released fixes across its ecosystem. Refer to the vendor advisories: Apple Security Advisory #128066, #128067, #128068, #128069, #128070, #128071, and #128072. The fixes add input validation before texture size arithmetic is performed.
Workarounds
- Restrict processing of texture files from untrusted senders through email and messaging gateway policies.
- Apply MDM configuration profiles to enforce minimum OS versions on managed Apple devices.
- Disable automatic preview of graphical attachments in applications where the setting is available until patching completes.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
