CVE-2026-88149

7.0High

Published 13 Oct 2026 · NVD status: Undergoing Analysis · AI triage by gemini-3.8-flash

7.0High

Attack vector: Local
Complexity: High
Privileges needed: Low
User interaction: None
Impact: Full C/I/A compromise
Weakness: CWE-415

Impact

A local authenticated attacker can elevate privileges to SYSTEM or kernel execution on the host. They must already possess local access or code execution on the machine.

Root cause

A double free condition in the Windows Ancillary Function Driver for WinSock (afd.sys) corrupts kernel memory.

Affected systems

Versions not listed — check the vendor advisory.

CVSS v3.1 · CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Fix & remediation

Install the relevant Microsoft security update from the MSRC advisory; no standalone workaround or configuration change is provided.

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD description

Double free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88149

Source: nvd.nist.gov/vuln/detail/CVE-2026-88149