Memory Leak in Windows TCP/IP Stack

Publication date: 2026-09-08

Last updated on: 2026-09-08

Assigner: Microsoft Corporation

Description

Missing release of memory after effective lifetime in Windows TCP/IP allows an unauthorized attacker to deny service over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-08

Last Modified

2026-09-08

Generated

2026-09-09

AI Q&A

2026-09-09

EPSS Evaluated

N/A

NVD

CVE-2026-69588

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_tcp_ip	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-401	The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Attack-Flow Graph

Executive Summary

This vulnerability involves a missing release of memory after its effective lifetime in Windows TCP/IP. This flaw allows an unauthorized attacker to cause a denial of service over a network by exploiting the memory leak.

Impact Analysis

An attacker could exploit this to disrupt network services, leading to downtime or degraded performance for systems relying on Windows TCP/IP. This may affect availability of critical services.

Mitigation Strategies

Apply the latest Windows security updates from Microsoft to patch the TCP/IP memory release issue. Monitor network traffic for unusual patterns indicating denial of service attempts.

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