Quick answers
- Is CVE-2026-97803 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-97803 being exploited in the wild.
- How severe is CVE-2026-97803?
- High severity, with a CVSS score of 7.8, published 13 October 2026.
- Which products and versions are affected?
- Microsoft Windows Kernel.
- Is there a fix for CVE-2026-97803?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-97803 attacked?
- It is attacked with local access, in an operating system.
- Am I affected by CVE-2026-97803?
- Check whether you run Microsoft Windows Kernel or Microsoft Windows 11 26h1. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A heap-based buffer overflow exists in the Windows Kernel that can be exploited by an authenticated local attacker to achieve privilege escalation. The vulnerability requires prior local access but no user interaction. Successful exploitation grants the attacker SYSTEM-level privileges, effectively compromising the entire system.
Affected products
- Microsoft Windows Kernel
Timeline
- 2026-10-13: disclosed