CISA-confirmed known exploited vulnerability

CVE-2016-3309

Microsoft Windows Kernel Privilege Escalation Vulnerability

Microsoft · Windows

Vulnerability details

A privilege escalation vulnerability exists when the Windows kernel fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode.

Added to CISA KEV: 2022-03-15

Ransomware campaign use: Known

CISA due date: 2022-04-05

Defensive guidance from CISA

Apply updates per vendor instructions.

This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.

Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC

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