Buffer over-read in Microsoft Windows and Windows Server - CVE-2026-119857

Vulnerability identifier: #VU165292

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-119857

CWE-ID: CWE-126

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to disclose sensitive kernel memory content.

The vulnerability exists due to a buffer over-read in the Windows kernel when reading data beyond the end of a buffer. A local user can trigger the out-of-bounds read locally to disclose certain kernel memory content.

Microsoft Windows
Windows Server

Install security update from vendor's website.

Microsoft Windows - addressed in versions 10 21H2 10.0.19044.7846, 10 22H2 10.0.19045.7846, 11 23H2 10.0.22631.7711, 11 24H2 10.0.26100.9911, 11 24H2 10.0.26100.9974, 11 25H2 10.0.26200.9911, 11 25H2 10.0.26200.9974, 11 26H1 10.0.28000.3501
Windows Server - addressed in versions 2022 10.0.20348.5870, 2025 10.0.26100.33730, 2025 10.0.26100.33822

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-119857
• https://support.microsoft.com/help/5131096

• Multiple vulnerabilities in Microsoft Windows