CVE-2026-63298
CriticalCVSS 9.9Summary
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.
Risk Assessment
The attacker can execute arbitrary code on the host system with the privileges of the LXD daemon, posing a severe threat to system integrity and confidentiality.
Recommendation
Upgrade LXD to a patched version that validates configuration values and restrict access to instance configuration.
Original NVD description (English source)
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.