Out-of-bounds read in Microsoft Windows - CVE-2026-50428
Published: July 15, 2026
Vulnerability identifier: #VU137802
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-50428
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in Windows Container Isolation FS Filter Driver (unionfs.sys). A local user can trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service (DoS) attack..
Affected software
Microsoft Windows
How to mitigate CVE-2026-50428
Install updates from vendor's website.
Microsoft Windows - addressed in versions 11 26H1 10.0.28000.2269, 11 26H1 10.0.28000.2525