Reverse engineering of Apple's iOS 0-click CVE-2025-43300: 2 bytes that make size matter
blog.quarkslab.com | vulnerability | Critical | Actively exploited | CVE-2025-43300 | #reverse-engineering | #ios | #apple | #cve-2025-43300 | #imageio | #zero-click
Summary
Quarkslab's root-cause analysis of CVE-2025-43300, the iOS ImageIO out-of-bounds write exploited in zero-click campaigns; patch diffing points to RawCamera and DNG parsing.
- CVE
- CVE-2025-43300
- CVSS
- 10
- Published
- Collected
--- id: 4338 title: "Reverse engineering of Apple's iOS 0-click CVE-2025-43300: 2 bytes that make size matter" cve: CVE-2025-43300 cvss: 10 severity: critical source_domain: blog.quarkslab.com source_url: "https://blog.quarkslab.com/patch-analysis-of-Apple-iOS-CVE-2025-43300.html" published_at: "2025-09-03 22:00" tags: ["reverse-engineering", "ios", "apple", "cve-2025-43300", "imageio", "zero-click"] phying_url: "https://phying.com/item/4338" lang: en --- # Reverse engineering of Apple's iOS 0-click CVE-2025-43300: 2 bytes that make size matter ## Summary Quarkslab's root-cause analysis of CVE-2025-43300, the iOS ImageIO out-of-bounds write exploited in zero-click campaigns; patch diffing points to RawCamera and DNG parsing. ## Intelligence Metadata - **Sources:** blog.quarkslab.com - **CVE:** CVE-2025-43300 - **CVSS:** 10 - **Published:** 2025-09-03 22:00 - **Original:** https://blog.quarkslab.com/patch-analysis-of-Apple-iOS-CVE-2025-43300.html - **Phying News:** https://phying.com/item/4338