Type Confusion in WebKit (Safari, iOS, iPadOS, macOS, visionOS)
CVE-2025-43541 is a type confusion vulnerability in WebKit, the browser engine used by Safari, iOS, iPadOS, macOS, and visionOS. The issue arises from improper state handling, which can be triggered by processing maliciously crafted web content. This flaw was reported by Hossein Lotfi of Trend Micro Zero Day Initiative and is addressed in Safari 26.2, iOS/iPadOS 18.7.3 and 26.2, macOS Tahoe 26.2, and visionOS 26.2. Exploitation may result in an unexpected Safari crash.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a proof-of-concept (PoC) exploit for CVE-2025-43541, a vulnerability in the WebKit / JavaScriptCore engine, particularly affecting Safari on iOS. The repository consists of two files: a README.md with detailed background, warnings, and usage notes, and an index.html file containing the exploit code. The exploit is implemented in JavaScript within the HTML file and works by repeatedly creating and resizing ArrayBuffers, accessing them via DataView, and stressing the JavaScript engine in a tight loop. This is designed to trigger instability, excessive memory usage, or crashes in the browser, especially on platforms with incomplete or buggy implementations of Resizable ArrayBuffer (notably Safari on iOS). There are no network endpoints, URLs, or external resources referenced in the code. The exploit is a local, browser-based denial-of-service PoC and does not provide remote code execution or persistent access. Its primary purpose is for security research and vulnerability testing.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
10 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.