CVE-2026-40369
7.8 HIGHHeap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally
Published: 2026-05-12 · Last updated: 2026-06-01
Severity and scoring
- CVSS
- 7.8 HIGH
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-822
Affected products
| Vendor | Product |
|---|---|
| microsoft | windows_11_24h2, windows_11_25h2, windows_11_26h1 |
Description
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
Source: NVD
References
Related CVEs
Same vendor
- CVE-2026-50507 — Protection mechanism failure in Windows BitLocker allows an unauthorized attacker to bypass a security feature with a physical attack (6.8 MEDIUM)
- CVE-2026-49160 — Uncontrolled resource consumption in HTTP/2 allows an unauthorized attacker to deny service over a network (7.5 HIGH)
- CVE-2026-48583 — Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally (7.8 HIGH)
- CVE-2026-48578 — Protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature locally (7.9 HIGH)
- CVE-2026-48576 — Protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature locally (7.9 HIGH)
Same CWE
- CVE-2026-45645 — Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally (7.8 HIGH)
- CVE-2026-45643 — Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally (7.8 HIGH)
- CVE-2026-45471 — Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally (7.8 HIGH)
- CVE-2026-44805 — Use after free in Windows Network Controller (NC) Host Agent allows an authorized attacker to deny service locally (5.5 MEDIUM)
- CVE-2026-8835 — IBM HTTP Server 8.5, and 9.0 is vulnerable to invalid pointer dereference (7.3 HIGH)