CVE-2026-72936 Use after free in Windows SMB Client allows an unauthorized attacker to execute code over a network

Description

Use after free in Windows SMB Client allows an unauthorized attacker to execute code over a network.

Affected products and versions

Product	Affected versions	Fixed in
Windows 11 Version 23H2 10.0	10.0.22631.0 → < 10.0.22631.7582	10.0.22631.7582
Windows 11 Version 24H2 10.0	10.0.26100.0 → < 10.0.26100.9445	10.0.26100.9445
Windows 11 Version 25H2 10.0	10.0.26200.0 → < 10.0.26200.9445	10.0.26200.9445
Windows 11 version 26H1 10.0	10.0.28000.0 → < 10.0.28000.2954	10.0.28000.2954
Windows Server 2022 10.0	10.0.20348.0 → < 10.0.20348.5622	10.0.20348.5622
Windows Server 2025 10.0	10.0.26100.0 → < 10.0.26100.33438	10.0.26100.33438
Windows Server 2025 (Server Core installation) 10.0	10.0.26100.0 → < 10.0.26100.33438	10.0.26100.33438

Other CVEs of Windows 11 Version 23H2

The 3424 CVEs of Windows 11 Version 23H2 →

CVE-2026-108136 Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally 7.8 High CVE-2026-108135 Improper link resolution before file access ('link following') in Windows Backup Engine allows an authorized attacker to… 7.0 High CVE-2026-105016 Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network 9.8 Critical CVE-2026-108131 No cwe for this issue in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform… 7.5 High