This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the storport.sys driver. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before writing to memory. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.
KB5006675: WWindows 10 version 1507 LTS Security Update (October 2021)
KB5006669: Windows 10 Version 1607 and Windows Server 2016 Security Update (October 2021)
KB5006667: Windows 10 version 1909 Security Update (October 2021)
KB5006672: Windows 10 Version 1809 and Windows Server 2019 Security Update (October 2021)
KB5006670: Windows 10 Version 2004 / Windows 10 Version 20H2 / Windows 10 Version 21H1 October 2021 Security Update
Patch Tuesday - October 2021