Microsoft Windows Graphics Kernel: Local privilege escalation via out-of-bounds read
Summary
An out-of-bounds read in the Windows Graphics Kernel allows an authorized local attacker to elevate privileges on the affected system. The attacker needs local access with low privileges, and the attack complexity is rated high. The CVSS vector rates confidentiality, integrity and availability impact as high, so a successful attack can give full control of the machine.
Affected
- Windows 10 Version 1607 (before 10.0.14393.9688)
- Windows 10 Version 1809 (before 10.0.17763.9487)
- Windows 10 Version 21H2 (before 10.0.19044.7846)
- Windows 10 Version 22H2 (before 10.0.19045.7846)
- Windows 11 Version 23H2 (before 10.0.22631.7711)
- Windows 11 Version 24H2 (before 10.0.26100.9974)
- Windows 11 Version 25H2 (before 10.0.26200.9974)
- Windows 11 Version 26H1 (before 10.0.28000.3501)
- Windows 11 Version 26H2 (before 10.0.26300.9974)
- Windows Server 2016, including Server Core (before 10.0.14393.9688)
- Windows Server 2019, including Server Core (before 10.0.17763.9487)
- Windows Server 2022 (before 10.0.20348.5870)
Fixed in
- Install the Microsoft security update that brings the build to the fixed version listed for each affected product.
- Fixed builds are taken from the CVE record and third-party data; verify the exact KB numbers and the list on MSRC before rollout.
Workaround
Unknown.
Exploitation
- No evidence of exploitation in the wild found at the time of writing.
- No public proof-of-concept found.
- CISA SSVC assessment: Exploitation none, Automatable no, Technical Impact total.
Our recommendation
- Patch affected Windows 10, Windows 11 and Windows Server systems in the normal update cycle, prioritising multi-user systems, Remote Desktop and terminal servers.
- Confirm that Windows 10 1607, 1809, 21H2 and 22H2 still receive security updates or are covered by Extended Security Updates.
- Check the exact fixed builds and KB numbers on the MSRC advisory before rollout.
- Monitor for a public proof-of-concept or CISA KEV listing, which would raise the priority.
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)
- Updates (KB)
- KB5131291, KB5131085, KB5131096, KB5131090, KB5131087, KB5132061
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- CVE record (Microsoft CNA) www.cve.org
- MSRC Security Update Guide msrc.microsoft.com
- Third-party mirror of CVE.org data www.strix.ai
- CISA KEV alert (October 2026) www.cisa.gov
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, 08:01.
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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