CVE-2026-96863: microsoft windows 11 version 23h2 Heap-based Buffer Overflow

Vulnerability summary

CVE-2026-96863 is a medium (CVSS 6.8) Heap-based Buffer Overflow vulnerability in microsoft windows 11 version 23h2. EPSS estimates a 0.31% chance of exploitation in the next 30 days, higher than 22.7% of scored vulnerabilities.

Timeline

1. 13-10-2026
   PublishedVulnerability first disclosed.
2. 21-10-2026
   Last modifiedVulnerability information updated.

Description

Heap-based buffer overflow in Windows Storage Port Driver allows an unauthorized attacker to elevate privileges with a physical attack.

• CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().