---
id: CVE-2025-14946
title: A flaw was found in libnbd
summary: >-
  A flaw was found in libnbd. A malicious actor could exploit this by convincing
  libnbd to open a specially crafted Uniform Resource Identifier (URI). This
  vulnerability arises because non-standard hostnames starting with '-o' are
  incorrec…
severity: medium
cvss: 4.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L'
cwe:
  - CWE-88
published: '2025-12-19'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T20:10:00.247'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-14946'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2025-14946'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2423789'
    label: secalert@redhat.com
  - url: 'https://libguestfs.org/libnbd-release-notes-1.24.1.html#Security'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00144
epssPercentile: 0.03104
ingestedAt: '2026-09-30T20:23:19.460Z'
---

## Overview

A flaw was found in libnbd. A malicious actor could exploit this by convincing libnbd to open a specially crafted Uniform Resource Identifier (URI). This vulnerability arises because non-standard hostnames starting with '-o' are incorrectly interpreted as arguments to the Secure Shell (SSH) process, rather than as hostnames. This could lead to arbitrary code execution with the privileges of the user running libnbd.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.