CVE-2026-72958: CWE-415: Double Free in Microsoft Windows 11 Version 24H2

CVE-2026-72958 is a double free vulnerability (CWE-415) in Windows Credential Guard on Microsoft Windows 11 Version 24H2. The flaw allows an authorized attacker with local access to elevate privileges by exploiting improper memory management that leads to a double free condition. The vulnerability has a CVSS v3.1 base score of 8.2, indicating high severity with impacts on confidentiality, integrity, and availability. Affected versions include Windows builds >=10.0.26100.0 and <10.0.26100.9445, >=10.0.26200.0 and <10.0.26200.9445, >=10.0.28000.0 and <10.0.28000.2954, and >=10.0.26100.0 and <10.0.26100.33438. Microsoft has released an official fix for this vulnerability.

An authorized local attacker can exploit this vulnerability to elevate privileges, potentially gaining higher system rights. The vulnerability affects confidentiality, integrity, and availability of the affected system. There are no known exploits in the wild at this time.

An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft for Windows 11 Version 24H2 to remediate this vulnerability. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72958 for detailed update instructions.