CVE-2026-96909 Windows BitLocker Remote Code Execution Vulnerability

Critical 9.8 Published 13 Oct 2026 Updated 29 Oct 2026

An unauthorized attacker can execute code over a network via a heap-based buffer overflow in Windows BitLocker.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-96909?

CVE-2026-96909 is a critical memory corruption vulnerability in Microsoft Windows 11 23h2, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Heap-based buffer overflow in Windows BitLocker allows an unauthorized attacker to execute code over a network.

Weakness: CWE-122

Which versions are affected by CVE-2026-96909?

It affects 7 products.

Products include Microsoft Windows 11 23h2, Microsoft Windows 11 24h2, Microsoft Windows 11 25h2, Microsoft Windows 11 26h1, Microsoft Windows 11 26h2, Microsoft Windows Server 2022 and 1 more.

How do I fix CVE-2026-96909?

No fix has been published for CVE-2026-96909 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-96909 being exploited?

There is no known exploitation of CVE-2026-96909 in the wild and no public exploit code.

All Microsoft Windows 11 23h2 vulnerabilities

Sources

Also known as GHSA-f44g-f5v6-h7gj.