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TI-2026-45144 Aliases CVE-2026-63298

LXD arbitrary lxc.conf directive injection via NVIDIA instance configuration

Priority HIGH 73CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0069 53rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed LXD (Canonical): 5.0.8, 5.21.6, 4.0.12

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CanonicalLXD5.0.0 to before 5.0.8; 5.21.0 to before 5.21.6; 4.0.0 to before 4.0.125.0.8, 5.21.6, 4.0.12Patch availableCNA
  • LXD VendorCanonical Affected 5.0.0 to before 5.0.8; 5.21.0 to before 5.21.6; 4.0.0 to before 4.0.12 Fixed in 5.0.8, 5.21.6, 4.0.12 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*4.0.0 to before 4.0.12; 5.0.0 to before 5.0.8; 5.1 to before 5.21.6; 6.0 – 6.9VulnerableCanonical
  • cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:* Versions 4.0.0 to before 4.0.12; 5.0.0 to before 5.0.8; 5.1 to before 5.21.6; 6.0 – 6.9 Vulnerable ·Canonical

Remediation

  • Fix · CNA LXD (Canonical) Fixed in 5.0.8, 5.21.6, 4.0.12

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-63298

References

Exploit 1

  • TI-2026-22659 Authenticated RCE via unsanitized compression_algorithm CVSS 4.0CRITICAL 9.4
  • TI-2026-47475 Path traversal via unvalidated instance name in backup tarball restore enables root file write / RCE CVSS 3.1CRITICAL 9.9
  • TI-2026-45146 Cross-project instance move bypasses all project restrictions allowing host command execution CVSS 3.1CRITICAL 9.9
  • TI-2026-45143 Cross-project instance copy bypasses target project restrictions via TOCTOU in config merge CVSS 3.1CRITICAL 9.9
  • TI-2026-45142 Project restriction bypass via instance migration config override CVSS 3.1CRITICAL 9.9
  • TI-2026-45140 Root RCE via image backup.yaml symlink CVSS 3.1CRITICAL 9.9
See all 34 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences