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Fencer Vulns
medium 4.8

CVE-2025-14946 json

Libnbd: libnbd: arbitrary code execution via ssh argument injection through a malicious uri

published 2025-12-19 10 mo ago modified 2026-11-05 3 d ago also EUVD-2025-204536

cvss
4.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 3%
public exploits
0
none known

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 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.

Patch / fix

  • Red Hat libnbd 1.22.5, 1.23.9
  • libnbd Debian 14 1.22.5-1

debian advisories DEBIAN-CVE-2025-14946

  • libnbd openSUSE Tumbleweed 1.24.0-2.1

opensuse advisories openSUSE-SU-2025:15842-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-14946 updated cvss 4.8

libnbd: libnbd: Arbitrary code execution via SSH argument injection through a malicious URI

  • Red Hat Enterprise Linux 10 libnbd
    affected: workaround, no fix available
  • Red Hat Enterprise Linux 8 libnbd, nbdfuse, ocaml-libnbd, python3-libnbd, libnbd-bash-completion Red Hat Enterprise Linux 9 libnbd, nbdfuse, ocaml-libnbd, python3-libnbd, libnbd-bash-completion Red Hat OpenShift Virtualization 4 container-native-virtualization/virt-cdi-cloner, container-native-virtualization/virt-cdi-importer, container-native-virtualization/virt-cdi-operator, container-native-virtualization/virt-cdi-apiserver, container-native-virtualization/virt-cdi-controller, container-native-virtualization/virt-cdi-uploadproxy, +8 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
10 mo ago

Exploit prediction

0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L

Affected products

  • Red Hat libnbd
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift Virtualization 4

Classification

Weakness
  • CWE-88 Improper Neutralization of Argument Delimiters in a Command

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.