Microsoft Windows 11 26h2 vulnerabilities

Improper resource shutdown or release in Windows UEFI allows an authorized attacker to bypass a security feature locally.

Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.

Heap-based buffer overflow in Microsoft PostScript Printer Driver allows an authorized attacker to execute code over a network.

Use after free in Windows Update Delivery Optimization allows an authorized attacker to elevate privileges locally.

Use after free in Software Protection Platform (SPP) allows an authorized attacker to elevate privileges locally.

Improper resolution of path equivalence in Windows SmartScreen allows an unauthorized attacker to bypass a security feature over a network.

Use after free in Windows Broadcast DVR User Service allows an authorized attacker to elevate privileges locally.

Use after free in Windows Message Queuing allows an unauthorized attacker to execute code over a network.

Time-of-check time-of-use (toctou) race condition in Windows Modern Device Management (MDM) allows an authorized attacker to elevate privileges locally.

Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

Improper link resolution before file access ('link following') in Windows Backup Engine allows an authorized attacker to elevate privileges locally.

Use after free in Windows Broadcast DVR User Service allows an authorized attacker to elevate privileges locally.

An elevation of privilege vulnerability exists in the Network Driver Interface Specification (NDIS) when ndis.sys fails to check the length of a buffer prior to copying memory to it. To exploit the vulnerability, in a local attack scenario, an attacker could run a specially crafted application to elevate the attacker's privilege level. An attacker who successfully exploited this vulnerability could run processes in an elevated context. However, an attacker must first gain access to the local system with the ability to execute a malicious application in order to exploit this vulnerability. The security update addresses the vulnerability by changing how ndis.sys validates buffer length.

Out-of-bounds read in Windows Overlay Filter allows an authorized attacker to elevate privileges locally.

Heap-based buffer overflow in HID class driver allows an authorized attacker to elevate privileges locally.

Insecure default variable initialization in Microsoft QUIC allows an unauthorized attacker to bypass a security feature over a network.