CVE-2026-42980

NT OS Kernel Elevation of Privilege Vulnerability

Integer underflow (wrap or wraparound) in Windows NT OS Kernel allows an authorized attacker to elevate privileges locally.

Affected

Microsoft · Windows 10 Version 1607 · Windows 10 Version 1809 · Windows 10 Version 21H2 · Windows 10 Version 22H2 · Windows 11 version 23H2 · Windows 11 Version 23H2

CVSS v3.1 MICROSOFT

7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.33% chance of exploitation in the next 30 days, 25th percentile

Published

2026-06-09

Updated

2026-09-24

Proof-of-concept exploits (1)

• G4sp4rCS/CVE-2026-42980-POC143★ · 2026-07-07

Security advisories

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42980

References

• CVE Record
• NVD entry

Related

• CVE-2015-8351
• CVE-2019-11707
• CVE-2021-43857
• CVE-2022-25012
• CVE-2023-2255
• CVE-2023-32784