CVE-2026-43655

HIGH

iOS and iPadOS < 26.5 - Out-of-bounds Read

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-43655. PoCs published by Somisomair.

AI-analyzed exploit summary This repository contains a functional Objective-C exploit for CVE-2026-43655, demonstrating a use-after-free (UAF) vulnerability in AppleM2ScalerCSCDriver. The PoC submits async operations, closes the connection, and sprays replacement objects to trigger a scheduler read from freed memory, confirming the UAF via distinct marker values.

Description

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, watchOS 26.5. An app may be able to cause unexpected system termination or read kernel memory.

Exploits (1)

github WORKING POC
by Somisomair · objective-cpoc
https://github.com/Somisomair/CVE-2026-43655-AppleM2ScalerCSCDriver-UAF

This repository contains a functional Objective-C exploit for CVE-2026-43655, demonstrating a use-after-free (UAF) vulnerability in AppleM2ScalerCSCDriver. The PoC submits async operations, closes the connection, and sprays replacement objects to trigger a scheduler read from freed memory, confirming the UAF via distinct marker values.

Classification
Working Poc 100%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: AppleM2ScalerCSCDriver on iOS 26.4
No auth needed
Prerequisites: iOS device running version 26.4 · get-task-allow entitlement
mistral-large-3 · analyzed Jun 22, 2026 Full analysis →

Scores

CVSS v3 7.3
EPSS 0.0027
EPSS Percentile 19.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-125
Status published
Products (9)
Apple/iOS and iPadOS < 26.5
apple/ipados < 26.5
apple/iphone_os < 26.5
Apple/macOS < 26.5
apple/macos 26.0 - 26.5
Apple/tvOS < 26.5
apple/tvos < 26.5
Apple/watchOS < 26.5
apple/watchos < 26.5
Published May 11, 2026
Tracked Since May 12, 2026