EUVD-2026-44078
GHSA-vh9r-pq79-r78m
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Local-only attack requiring a low-privilege account; read-only kernel memory disclosure with no integrity or availability impact and no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
2DescriptionCVE.org
Buffer over-read in Windows Kernel allows an authorized attacker to disclose information locally.
AnalysisAI
Buffer over-read in the Windows Kernel exposes kernel memory contents to locally authenticated, low-privilege attackers across a broad range of Windows 10, Windows 11, and Windows Server releases. The flaw (CWE-126) allows out-of-bounds memory reads within the kernel address space, resulting in high-confidence confidentiality impact with no integrity or availability consequence. No public exploit code has been identified and CISA SSVC assessment confirms no active exploitation at time of analysis, though the wide deployment footprint of affected Windows versions makes prompt patching a sensible priority.
Technical ContextAI
CWE-126 (Buffer Over-read) describes a condition where a read operation accesses memory beyond the intended buffer boundary. In the Windows Kernel context, an over-read can expose adjacent kernel-mode memory, which may contain sensitive runtime data such as cryptographic material, credentials cached by the OS, or process/session metadata. The affected products span a wide surface: CPE strings confirm impact across Windows 10 versions 1607 through 22H2, Windows 11 versions 24H2 through 26H1, and Windows Server 2012 through 2025, including Server Core installations. The kernel-mode location of the flaw means successful exploitation bypasses typical user-space memory protections and can yield data that would not otherwise be accessible to a low-privilege process.
RemediationAI
Apply the Microsoft-released security update addressing this vulnerability, available via Windows Update, WSUS, or the Microsoft Update Catalog. Specific fixed build versions by product: Windows 10 1607 and Windows Server 2016 - update to build 10.0.14393.9339 or later; Windows 10 1809 and Windows Server 2019 - 10.0.17763.9020 or later; Windows 10 21H2 - 10.0.19044.7548 or later; Windows 10 22H2 - 10.0.19045.7548 or later; Windows 11 24H2 - 10.0.26100.8875 or later; Windows Server 2025 - 10.0.26100.33158 or later; Windows 11 25H2 - 10.0.26200.8875 or later; Windows 11 26H1 - 10.0.28000.2269 or later; Windows Server 2022 - 10.0.20348.5386 or later; Windows Server 2012 - 6.2.9200.26226 or later; Windows Server 2012 R2 - 6.3.9600.23291 or later. See https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50475. Where patching is temporarily infeasible, restrict interactive and remote logon rights to the minimum necessary set of accounts, apply least-privilege principles, and audit local account memberships - this limits the pool of principals who could exercise the over-read, though it is not a substitute for the patch.
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Same weakness CWE-126 – Buffer Over-read
View allSame technique Buffer Overflow
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External POC / Exploit Code
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