CVE-2026-62772 PUBLISHED

Windows Container Isolation FS Filter Driver (unionfs.sys) Elevation of Privilege Vulnerability

Assigner: microsoft
Reserved: 14.07.2026 Published: 11.08.2026 Updated: 11.08.2026

Heap-based buffer overflow in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.

Metrics

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

Product Status

Vendor Microsoft
Product Windows 11 version 26H1
Versions
  • affected from 10.0.28000.0 to 10.0.28000.2704 (excl.)

References

Problem Types