PatchTheCVECVE-2026-70243: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVE-2026-70243 is a high-severity flaw (CVSS 7.0) affecting windows 11 23h2, windows server 2025. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
Why this priority
- High severity
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.0 (High) |
| Attack vector | Local |
| Attack complexity | High |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 78%) |
| CISA exploited list | No |
| Weakness | CWE-416 |
| Published | 2026-10-13 |
| Last modified | 2026-10-22 |
Last updated 2026-10-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-70243?
windows 11 23h2: upgrade to 10.0.22631.7652; windows server 2025: upgrade to 10.0.26100.33650. Exact commands for each OS are on this page.
Is CVE-2026-70243 being exploited?
CVE-2026-70243 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-70243 affect?
CVE-2026-70243 affects windows 11 23h2, windows server 2025. Severity is high (CVSS 7.0). Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
How urgent is CVE-2026-70243?
Priority 35/100. High severity; On your watchlist
Software pages
Windows vulnerabilities · Windows Server vulnerabilities
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