All vulnerabilities
CVE-2026-97803

Windows Kernel Elevation of Privilege Vulnerability

Microsoft Windows 11 version 26H1Operating systems
Open in ThreatlineRecord JSON
CVSS
7.8High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.31%Chance of exploitation activity in the next 30 days, higher than 22% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in10.0.28000.3231Fixed versionCVE List
Published13 Oct 2026Updated 23 Oct 2026CVE List

What fixes it

  • 10.0.28000.3231Windows 11 version 26H1CVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Vendor and government advisories 1

Vendors that say their products are affected, and agencies that issued alerts. Check each for the fixed release of the product you run.

Reports 1

1 outlet mention it. Reports are not confirmation; each links to its source.

Description

Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

Text from CVE List

Affected versions 1

  • Windows 11 version 26H1affected: 10.0.28000.0 before 10.0.28000.3231CVE List

References 1