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Graphics rendering system used in macOS
In Apple's macOS operating system, Quartz is the Quartz 2D and Quartz Compositor part of the Core Graphics framework. Quartz includes both a 2D renderer in Core Graphics and the composition engine that sends instructions to the graphics card. Because of this vertical nature, Quartz is often synonymous with Core Graphics.
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Apple is urging users to update after patching a CoreGraphics vulnerability that attackers have already exploited against specific individuals.
Public PoC for CVE-2026-86950 triggers a controlled out-of-bounds write in CoreGraphics; code execution is not demonstrated.
Apple patched a CoreGraphics zero-day that may have been exploited in targeted attacks. A public PoC for the flaw is now available.