# CVE-2026-6862

> Vulnerability · severity: **MEDIUM** (CVSS 5.5).

## Description

A flaw was found in libefiboot, a component of efivar. The device path node parser in libefiboot fails to validate that each node's Length field is at least 4 bytes, which is the minimum size for an EFI (Extensible Firmware Interface) device path node header. A local user could exploit this vulnerability by providing a specially crafted device path node. This can lead to infinite recursion, causing stack exhaustion and a process crash, resulting in a denial of service (DoS).

## Key facts

- **CVE ID:** CVE-2026-6862
- **Published:** 2026-04-22
- **CVSS severity:** MEDIUM
- **CVSS base score:** 5.5
- **CWE codes:** CWE-674

## Affected products

- `ubuntu:libefiboot`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6862

## Citation

> AI Analytics. CVE-2026-6862. Retrieved 2026-07-20 from https://api.ai-analytics.org/cve/CVE-2026-6862. Derived from NIST NVD. Licensed CC0.

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