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Medium

Windows Kernel Memory Information Disclosure Vulnerability

IdentifiersCVE-2026-26169CWE-126· Buffer Over-read

CVE-2026-26169 is an information disclosure vulnerability in Windows Kernel Memory caused by a buffer over-read. The issue allows an authorized local attacker to read memory beyond the intended buffer boundary in kernel memory and disclose information that should not be accessible. The provided context identifies it as a Windows Kernel memory information disclosure flaw and notes Microsoft assessed it as more likely to be exploited.

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For your environment

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can disclose sensitive information from Windows kernel memory to a local authorized attacker. Depending on the memory contents exposed, this could aid further exploitation by revealing addresses, kernel data, or other sensitive process or system information useful for bypassing protections or chaining with additional local attacks.

Mitigation

If you can’t patch tonight, do this now.

No specific mitigation for CVE-2026-26169 was provided in the supplied content. In the absence of a patch, reducing opportunities for local code execution by untrusted users, limiting interactive access to authorized administrators and users only, and enforcing least privilege may reduce exposure, but the authoritative mitigation information is currently not available in the provided material.

Remediation

Patch, then assume compromise.

Apply the Microsoft security update released as part of the April 2026 Patch Tuesday fixes for CVE-2026-26169. No more specific product-level remediation details were provided in the supplied content.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
Microsoft CorporationWindows 10 1607operating_system
Microsoft CorporationWindows 10 1809operating_system
Microsoft CorporationWindows 10 21h2operating_system
Microsoft CorporationWindows 10 22h2operating_system
Microsoft CorporationWindows 11 23h2operating_system
Microsoft CorporationWindows 11 24h2operating_system
Microsoft CorporationWindows 11 25h2operating_system
Microsoft CorporationWindows 11 26h1operating_system
Microsoft CorporationWindows Server 2016operating_system
Microsoft CorporationWindows Server 2019operating_system
Microsoft CorporationWindows Server 2022operating_system
Microsoft CorporationWindows Server 2022 23h2operating_system
Microsoft CorporationWindows Server 2025operating_system
Microsoft CorporationWindows Server 23h2operating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures1

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity

Community discussion across Reddit, Mastodon, and other social sources.