Windows Graphics Kernel: Information disclosure via uninitialized resource
Summary
An uninitialized resource in the Windows Graphics Kernel can leak information from memory. An attacker needs local access with low privileges, such as an existing local account or code already running on the system. The impact is limited to confidentiality, but leaked data can help an attacker chain this flaw with other vulnerabilities.
Affected
- Windows 10 Version 1607 (builds 10.0.14393.0 before 10.0.14393.9688)
- Windows 10 Version 1809 (builds 10.0.17763.0 before 10.0.17763.9487)
- Windows 10 Version 21H2 (builds 10.0.19044.0 before 10.0.19044.7846)
- Windows 10 Version 22H2 (builds 10.0.19045.0 before 10.0.19045.7846)
- Windows 11 Version 23H2 (builds 10.0.22631.0 before 10.0.22631.7711)
- Windows 11 Version 24H2 (builds 10.0.26100.0 before 10.0.26100.9974)
- Windows 11 Version 25H2 (builds 10.0.26200.0 before 10.0.26200.9974)
- Windows 11 Version 26H1 (builds 10.0.28000.0 before 10.0.28000.3501)
- Windows 11 Version 26H2 (builds 10.0.26300.0 before 10.0.26300.9974)
- Windows Server 2016, including Server Core (builds 10.0.14393.0 before 10.0.14393.9688)
- Windows Server 2019, including Server Core (builds 10.0.17763.0 before 10.0.17763.9487)
- Windows Server 2022 (builds 10.0.20348.0 before 10.0.20348.5870)
Fixed in
- Fixed in the November 2026 security update from Microsoft.
- Fixed builds per the CVE 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.
- Knowledge base numbers: confirm per product in the Microsoft Security Update Guide.
Workaround
Unknown. No vendor-documented workaround is known. Limit local, low-privileged logons on shared or multi-user systems until the update is installed.
Exploitation
- Not known to be exploited in the wild.
- No public exploit or proof of concept found.
- CISA SSVC: exploitation none, not automatable.
- Rapid7 rates exploitation as less likely.
Our recommendation
- Install the November 2026 security update on all affected Windows 10, Windows 11 and Windows Server systems.
- Prioritise multi-user servers, terminal servers and endpoints used by contractors or untrusted staff.
- Review local accounts and restrict local logons where possible.
- Verify the fixed build and knowledge base numbers in the Microsoft Security Update Guide before rollout.
- Monitor for public proof of concept code or exploitation reports.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Information disclosure – 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: CVE-2026-88217 msrc.microsoft.com
- CVE Record CVE-2026-88217 www.cve.org
- VulDB entry 435300 vuldb.com
- Senserva KB 5131096 senserva.com
- Rapid7 Patch Tuesday November 2026 www.rapid7.com
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, 16:38.
Original description (NVD)
Use of uninitialized resource in Windows Graphics Kernel allows an authorized attacker to disclose information 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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