RCE in Canonical Lxd
CVE-2026-63298
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (50.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.007 · change: +0.003
Affected products
- Canonical Lxd — versions 5.0.0, 5.21.0, 4.0.0
Weakness classification (CWE)
References
- github.com/canonical/lxd/security/advisories/GHSA-vfh7-q59q-54v2 (Exploit, vendor-advisory, Mitigation, vdb-entry, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-63298?
- CVE-2026-63298 is a critical-severity vulnerability in Canonical Lxd, classified under OS Command Injection. CVSS score: 9.9/10. Published 2026-08-12.
- How severe is CVE-2026-63298?
- Critical severity. CVSS v3 base score is 9.9 out of 10.