CVE-2026-85804
Microsoft Windows 11 23h2: use-after-free
- Risk score
- 62/100
- CVSS
- 7.8 v3.1
- Exploit chance (30 days)
- 0.3%
- Published
- 13 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.
- Affected
- Microsoft Windows 11 23h2
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Story map
At a glance
Microsoft Windows 11 23h2: Red, act today. Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.
The flaws
- CVE-2026-85804: Use-after-free (CVSS 7.8 · EPSS 0%)
- CVE-2026-100219: Use-after-free (CVSS 9.8 · EPSS 1%)
- CVE-2026-96909: Heap buffer overflow (CVSS 9.8 · EPSS 1%)
- CVE-2026-85818: Improper verification of cryptographic signature in Windows Schannel allows an unauthorized… (CVSS 9.0 · EPSS 0%)
The fix
Fix: Apply the vendor's security update; see the linked advisory.
Who is exposed: Microsoft Windows 11 23h2
Where it stands
- No known exploitation
Connects to
- Same weakness: Use-after-free (CWE-416). 398 other warnings in 30 days
- Same product: Earlier Microsoft Windows 11 23h2 warnings. 31 in the last 90 days
Why it is Amber
- CVSS 7.8 high
- On your watchlist: windows server
References
Original description
Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.
Last activity 13 Oct 2026. Patch Forecast updates every hour.