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Apple Xcode Buffer Overflow Vulnerability in lldb Allowing Denial-of-Service

Vulnerability

A buffer overflow vulnerability has been identified in the lldb component of Apple Xcode. This issue, present in versions through 26.1, was addressed with improved bounds checking. A user in a privileged network position may exploit this vulnerability to cause a denial-of-service.

Impact

Exploitation of this vulnerability can lead to a denial-of-service condition, causing application or system instability.

Remediation

Users can update to Xcode 26.1 to address this vulnerability. This version is available for macOS Sequoia 15.6 and later.

Added: Nov 4, 2025, 2:18 AM
Updated: Nov 4, 2025, 2:18 AM

Vulnerability Rating

Custom Algorithm
spread
7.8
impact
2.5
exploitability
3.3
remediation
7.7
relevance
0.9
threat
0.0
urgency
2.9
incentive
0.8

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