EUVD-2026-44310
GHSA-4rwg-8m37-cjcc
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local low-privileged code execution (AV:L/PR:L) exploits a race-dependent use-after-free (AC:H), yielding full SYSTEM compromise (C:H/I:H/A:H) within the same host (S:U).
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
2DescriptionCVE.org
Use after free in Windows DirectX allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Windows DirectX graphics subsystem allows an authenticated attacker with low privileges to elevate to SYSTEM by triggering a use-after-free (CWE-416) memory-corruption condition. The flaw affects a broad range of Windows client and server releases from Windows 10 1607 through Windows 11 26H1 and Windows Server 2012 through Server 2025. There is no public exploit identified at time of analysis, and it is not listed in CISA KEV; the CVSS 3.1 base score is 7.0 (High), tempered by high attack complexity.
Technical ContextAI
DirectX is the Windows graphics and multimedia API layer whose kernel-mode components (notably the DirectX Graphics Kernel, dxgkrnl.sys, and related graphics drivers) run with high privilege and are reachable from low-privileged user processes through the graphics device interface. The root cause is a use-after-free (CWE-416): the code continues to reference a heap object after it has been freed, so an attacker who can control reallocation of that memory can influence kernel execution. Because this is a memory-corruption primitive in a kernel-adjacent, universally present Windows subsystem, successful exploitation typically converts a low-privileged foothold into full SYSTEM-level control. The CPE set from Microsoft confirms the affected surface spans virtually all supported Windows 10/11 builds (1607, 1809, 21H2, 22H2, 23H2, 24H2, 25H2, 26H1) and Windows Server editions (2012, 2012 R2, 2016, 2019, 2022, 2025), including Server Core installations.
RemediationAI
Patch available per vendor advisory - apply the Microsoft security update for CVE-2026-58629 through Windows Update or WSUS/Intune as the primary remediation; the exact patched build numbers per Windows release are listed in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58629. Prioritize multi-user, shared, and RDP/session-host systems where low-privileged users can execute code locally, since those most directly expose a local privilege-escalation vector. No official pre-patch workaround is published in the provided data; because DirectX is a core OS component it generally cannot be disabled without breaking graphics functionality, so compensating controls are limited to reducing local code-execution opportunity - restrict interactive and low-privileged logon on servers, enforce application allow-listing (e.g., WDAC/AppLocker) to prevent untrusted binaries from running, and monitor for anomalous local process behavior. These controls reduce the pool of attackers who can reach the flaw but do not remediate the underlying use-after-free, so patching remains mandatory.
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Same weakness CWE-416 – Use After Free
View allSame technique Use After Free
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External POC / Exploit Code
Leaving vuln.today