Improper Configuration Handling in LXD by Canonical
CVE-2026-63298

8.7HIGH

Key Information:

Vendor

Canonical

Status
Lxd
Vendor
CVE Published:
12 August 2026

What is CVE-2026-63298?

A vulnerability in LXD's handling of NVIDIA instance configuration allows authenticated attackers to inject arbitrary configuration directives. By inputting newline characters in key configuration values like 'nvidia.driver.capabilities' or 'nvidia.require.*', attackers can manipulate the 'lxc.conf' file generated by the system. This exploitation can lead to the execution of arbitrary code with the privileges of the LXD daemon, posing significant risks to host system security and integrity.

Affected Version(s)

LXD Linux 5.0.0 < 5.0.8

LXD Linux 5.21.0 < 5.21.6

LXD Linux 4.0.0 < 4.0.12

References

https://github.com/canonical/lxd/security/advisories/GHSA...
vdb-entryvendor-advisory

CVSS V3.1

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.