Windows Graphics Kernel: Out-of-bounds read enables local privilege escalation
Summary
An out-of-bounds read in the Windows Graphics Kernel allows a local attacker with a low-privilege account to elevate privileges. The flaw affects supported Windows 10, Windows 11 and Windows Server editions listed in the Microsoft CNA record. A successful attacker could gain SYSTEM-level control of the affected host, but only after an initial foothold on the system.
Affected
- Windows 10 Version 1607 (10.0.14393.0 to before 10.0.14393.9688)
- Windows 10 Version 1809 (10.0.17763.0 to before 10.0.17763.9487)
- Windows 10 Version 21H2 (10.0.19044.0 to before 10.0.19044.7846)
- Windows 10 Version 22H2 (10.0.19045.0 to before 10.0.19045.7846)
- Windows 11 Version 23H2 (10.0.22631.0 to before 10.0.22631.7711)
- Windows 11 Version 24H2 (10.0.26100.0 to before 10.0.26100.9974)
- Windows 11 Version 25H2 (10.0.26200.0 to before 10.0.26200.9974)
- Windows 11 Version 26H1 (10.0.28000.0 to before 10.0.28000.3501)
- Windows 11 Version 26H2 (10.0.26300.0 to before 10.0.26300.9974)
- Windows Server 2016 incl. Server Core (10.0.14393.0 to before 10.0.14393.9688)
- Windows Server 2019 incl. Server Core (10.0.17763.0 to before 10.0.17763.9487)
- Windows Server 2022 (10.0.20348.0 to before 10.0.20348.5870)
Fixed in
- Fixed builds per Microsoft CNA record: 10.0.14393.9688, 10.0.17763.9487, 10.0.19044.7846, 10.0.19045.7846, 10.0.22631.7711, 10.0.26100.9974, 10.0.26200.9974, 10.0.28000.3501, 10.0.26300.9974, 10.0.20348.5870
- KB number: Unknown. Not confirmed from a primary source.
- Fixed build for Windows Server 2025: Unknown.
Workaround
Unknown. No workaround or mitigation is documented yet. Patching is the only known remedy.
Exploitation
- CISA SSVC: Exploitation none, Automatable no, Technical Impact total.
- No evidence of exploitation in the wild found. The CISA KEV alert of 2026-10-13 does not mention this CVE.
- No public proof-of-concept exploit found.
- CVSS exploit code maturity is Unproven (E:U).
Our recommendation
- Patch affected Windows systems with the November 2026 security update, starting with servers, terminal servers and multi-user systems.
- Check the MSRC advisory for the KB number and fixed build for each Windows edition before rollout.
- Verify the support status of Windows 10 1607, 1809 and 21H2 machines, since unsupported systems will not receive a fix.
- Limit local logon rights and monitor for suspicious privilege escalation on endpoints.
- Re-check the CISA KEV catalogue and NVD once analysis is complete.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Elevation of privilege – Windows Graphics Kernel
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows, Windows ESU (Extended Security Updates), Microsoft Office
- Updates (KB)
- KB5131291, KB5131085, KB5131096, KB5131090, KB5131087, KB5132061
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Update Guide (MSRC) msrc.microsoft.com
- CVE.org record (Microsoft CNA) www.cve.org
- CISA alert, 2026-10-13 www.cisa.gov
- Strix (secondary aggregator) www.strix.ai
- KB5131096 summary (secondary) senserva.com
- VulDB, related entry vuldb.com
- OpenCVE, related entry app.opencve.io
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 11 Nov 2026, 02:55.
Original description (NVD)
Out-of-bounds read in Windows Graphics Kernel allows an authorized attacker to elevate privileges locally.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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