
iMessage EXR. zero click. heap overflow before the banner finishes. CVE-2026-86869. libAppleEXR sizes the buffer for 3 channels. 12 bytes. CompressedInterleave4 writes 4. 16 bytes. every pixel. three of those four bytes come from the file. BlastDoor never decodes EXR. Spotlight and the photo indexer do, later, with SDR hardcoded on. no tap. same ImageIO path on iPhone, iPad, and Mac. fixed in the 27 releases. older fleet still sits on it. credit: Niels Hofmans / ironPeak https://ironpeak.be/blog/ex-arrr-sailing-the-0-click-seas/ #iOS #ExploitDev #InfoSec
