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Description

Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.

PUBLISHED Reserved 2026-03-24 | Published 2026-05-12 | Updated 2026-05-20 | Assigner microsoft




HIGH: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Problem types

CWE-416: Use After Free

Product status

10.0.26100.0 (custom) before 10.0.26100.8457
affected

10.0.26200.0 (custom) before 10.0.26200.8457
affected

10.0.28000.0 (custom) before 10.0.28000.2113
affected

10.0.26100.0 (custom) before 10.0.26100.32860
affected

10.0.26100.0 (custom) before 10.0.26100.32860
affected

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33840 (Win32k Elevation of Privilege Vulnerability) vendor-advisory patch

cve.org (CVE-2026-33840)

nvd.nist.gov (CVE-2026-33840)

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