CVE-2026-50216

Integer Underflow in DNS Proxy Causes System Extension Crash

Published Oct 14, 2026 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Description
An integer underflow exists in the DNS proxy component of the macOS NetworkExtension system extension shipped with Akamai Guardicore Platform Agent (GPA) for macOS, whereby if a UDP datagram shorter than 96 bytes that begins with a specific value is received, a subsequent size computation underflows to a near-SIZE_MAX value, causing an allocation failure and uncaught Objective-C exception that aborts the root system extension.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Akamai
Akamai guardicore Platform Agent
Vendors & Products Akamai
Akamai guardicore Platform Agent
Type Values Removed Values Added
Title Integer Underflow in DNS Proxy Causes System Extension Crash
Type Values Removed Values Added
Title Integer Underflow in DNS Proxy Causes System Extension Crash on macOS
Type Values Removed Values Added
Title Integer Underflow in DNS Proxy Causes System Extension Crash on macOS
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description An integer underflow exists in the DNS proxy component of the macOS NetworkExtension system extension shipped with Akamai Guardicore Platform Agent (GPA) for macOS, whereby if a UDP datagram shorter than 96 bytes that begins with a specific value is received, a subsequent size computation underflows to a near-SIZE_MAX value, causing an allocation failure and uncaught Objective-C exception that aborts the root system extension.
Weaknesses CWE-191
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Oct 14, 2026, 3:07 PM
Reserved
Jun 4, 2026, 12:00 AM
Status
Awaiting Analysis
Published
Oct 14, 2026, 6:17 AM
Modified
Oct 16, 2026, 7:55 PM