Memory allocation with excessive size value in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.
References
| Link | Resource |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40378 | Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
16 Jul 2026, 19:45
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:* cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:* cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:* cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:* cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:* cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:-:*:x64:* cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:* cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:* cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:* cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:-:*:x64:* cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:* |
|
| References | () https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40378 - Vendor Advisory | |
| First Time |
Microsoft windows 11 24h2
Microsoft windows 10 1809 Microsoft windows 11 25h2 Microsoft windows 10 21h2 Microsoft windows 10 22h2 Microsoft windows 11 26h1 Microsoft windows Server 2012 Microsoft windows Server 2022 Microsoft windows Server 2025 Microsoft windows Server 2019 Microsoft windows Server 2016 Microsoft Microsoft windows 10 1607 Microsoft windows 11 23h2 |
14 Jul 2026, 17:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-07-14 17:16
Updated : 2026-07-22 16:17
NVD link : CVE-2026-40378
Mitre link : CVE-2026-40378
CVE.ORG link : CVE-2026-40378
JSON object : View
Products Affected
microsoft
- windows_11_25h2
- windows_10_1607
- windows_11_24h2
- windows_10_1809
- windows_11_23h2
- windows_11_26h1
- windows_10_22h2
- windows_server_2012
- windows_server_2016
- windows_10_21h2
- windows_server_2022
- windows_server_2019
- windows_server_2025
CWE
CWE-789
Memory Allocation with Excessive Size Value