Apple mDNSResponder Null Pointer Dereference Vulnerability Leading to Denial-of-Service

Vulnerability

A null pointer dereference vulnerability has been identified in the mDNSResponder component of Apple operating systems, including iOS, iPadOS, macOS Tahoe, and tvOS, all version 26.5. This vulnerability allows an attacker on the local network to cause a denial-of-service condition.

Impact

Exploitation of this vulnerability can lead to a denial-of-service condition, causing affected devices to become unresponsive or unavailable.

Added: May 11, 2026, 9:40 PM
Updated: May 11, 2026, 9:40 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
2.5
exploitability
4.7
remediation
7.7
relevance
8.0
threat
0.0
urgency
2.9
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.