CVE-2026-97830: CWE-415: Double Free in Microsoft Windows 11 version 23H2
Description
Double free in Windows Internet Information Services allows an unauthorized attacker to deny service over a network.
CVSS v3.1
Score 7.5high
Affected software
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows 11 Version 26H2
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-97830 is a double free vulnerability (CWE-415) in Windows Internet Information Services on Windows 11 version 23H2. The flaw allows an unauthenticated attacker to trigger a denial of service condition remotely by exploiting improper memory management. The vulnerability has a CVSS 3.1 base score of 7.5, indicating high severity, with network attack vector, low attack complexity, no privileges or user interaction required, and impacts availability only. Microsoft has released an official fix for affected versions.
Potential Impact
An attacker can remotely cause a denial of service on affected Windows 11 systems running Internet Information Services by exploiting the double free vulnerability. There is no impact on confidentiality or integrity, but availability is severely affected. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Microsoft has provided an official fix for this vulnerability. Users and administrators should apply the security updates as detailed in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97830 to remediate this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-25T04:47:50.226Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97830","vendor":"Microsoft"}]
Threat ID: 6ace859c2cdf04f656a01ada
Added to database: 10/13/2026, 19:25:16 UTC
Last enriched: 10/13/2026, 19:33:16 UTC
Last updated: 10/13/2026, 22:50:44 UTC
Views: 8
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