CVE-2026-63298

Published: Aug 12, 2026Modified: Sep 11, 2026

9.9

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Exploitability: 3.1 / Impact: 6.0

Source: security@ubuntu.com (Secondary)

Description

An improper neutralization of special elements vulnerability in LXD's NVIDIA instance configuration handling allows an authenticated attacker to inject arbitrary configuration directives. By supplying newline characters within the 'nvidia.driver.capabilities' or 'nvidia.require.*' configuration values, an attacker can manipulate the generated lxc.conf file. This flaw enables the attacker to execute arbitrary code on the host system with the privileges of the LXD daemon.

Affected (4)

Products: Canonical: Lxd

1 product

Configuration A

4 vulnerable

Vulnerable Software	Affected Versions
Canonical Lxd	From 4.0.0 to 4.0.12
Canonical Lxd	From 5.0.0 to 5.0.8
Canonical Lxd	From 5.1 to 5.21.6
Canonical Lxd	From 6.0 to 6.9

Related CWEs

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

References (2)

https://github.com/canonical/lxd/security/advisories/GHSA-vfh7-q59q-54v2

Source: security@ubuntu.com

Vendor AdvisoryExploitMitigation

https://github.com/canonical/lxd/security/advisories/GHSA-vfh7-q59q-54v2

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Vendor AdvisoryExploitMitigation

Timeline

No history available yet.