Out-of-Bounds Read Vulnerability in Apple Operating Systems
CVE-2026-43655

7.3HIGH

Key Information:

Vendor

Apple
Status
iOS And iPad OS
Mac OS
TV OS
Watch OS
Vendor
CVE Published:
11 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-43655?

This vulnerability allows an application to perform out-of-bounds read operations, potentially leading to unexpected system termination or unauthorized access to kernel memory. Apple has resolved this issue in the latest updates for its operating systems, enhancing their security by implementing improved bounds checking.

Affected Version(s)

iOS and iPadOS 0 < 26.5

macOS 0 < 26.5

tvOS 0 < 26.5

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-43655-AppleM2ScalerCSCDriver-UAF
Created by Somisomair

References

https://support.apple.com/en-us/127110
https://support.apple.com/en-us/127115
https://support.apple.com/en-us/127118

CVSS V3.1

Score:
7.3
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.