CVE-2026-62871
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.
Mitigation
No mitigation is required. Red Hat's .NET packages do not ship the Windows Desktop runtime components (Microsoft.WindowsDesktop.App.Runtime) that contain the vulnerability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.8 | N/A | 7.8 |
| Attack Vector | Local | N/A | Local |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | Required | N/A | Required |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | High | N/A | High |
| Integrity Impact | High | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
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