CVE-2026-62871

dotnet: .NET: Arbitrary Code Execution via Out-of-Bounds Write

Loading…

Severity

Important

Red Hat Product Security

7.8

CVSS 3.1

Review impact separately from score.

Published · August 12, 2026

Updated · September 3, 2026

Description

A flaw was found in .NET. An out-of-bounds write vulnerability allows an unauthorized attacker to execute arbitrary code locally. This could lead to a complete compromise of the affected system.

Statement

Red Hat's .NET packages ship only the cross-platform runtime (Microsoft.NETCore.App.Runtime). CVE-2026-62871 affects exclusively Microsoft.WindowsDesktop.App.Runtime.win-* — the WinForms and WPF GUI subsystem, which is Windows-only and not included in any Red Hat .NET build. No Red Hat product is affected.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

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

CWE-787 · Out-of-bounds Write