BaselineWatch
Desk

CVE-2026-97803

7.8 high SSVC exploitation: none Analyzed

Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

Fix

Microsoft's update · Important

  • KB5127646 — Windows 11 Version 26H1, Windows 11 version 26H1 · build 10.0.28000.3231 · restart required

From the 2026-Oct release note of Microsoft's Security Update Guide, revised 2026-10-28 · Exploitation Less Likely.

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 3

  1. Cpes+2 CPE criteria (now 2)NVD modified 2026-10-16 10:40
  2. StatusUndergoing Analysis → AnalyzedNVD modified 2026-10-16 10:40
  3. First seenCVSS 7.8NVD modified 2026-10-13 23:19

Affected (CPE criteria) 2

  • cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*
  • cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*

References 1