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CVE-2026-63300

CVE-2026-63300 · Cross-project instance move bypasses all project restrictions allowing host command execution

This page contains facts from public vulnerability sources. Check the original advisory before updating.

An improper validation vulnerability in the instancePostMigration function in lxd/instance_post.go of LXD allows an authenticated attacker with can_create_instances permissions on a restricted project to bypass project-level security restrictions. When migrating an instance between projects, LXD fails to validate the instance's configuration against the target project's enforced restrictions (such as restricted.containers.lowlevel, restricted.devices.*, and restricted.networks.access). An attacker can exploit this by creating a disallowed or high-privilege instance in an unrestricted project and subsequently moving it into the restricted project.

CVSS 9.9 · Critical · EPSS 0.5% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • lxd

    Versions
    • ≥ 5.0.0, < 5.0.8: Affected (semver)
    • ≥ 5.21.0, < 5.21.6: Affected (semver)
    • ≥ 6.0, < 6.10: Affected (semver)

    Update to 5.0.8; Update to 5.21.6; Update to 6.10

  • lxd Debian:12

    Versions
    • 5.0.2+git20231211.1364ae4-1
    • 5.0.2+git20231211.1364ae4-2
    • 5.0.2+git20231211.1364ae4-3
    • 5.0.2+git20231211.1364ae4-4
    • 5.0.2+git20231211.1364ae4-5
    • 5.0.2+git20231211.1364ae4-6
    • 5.0.2+git20231211.1364ae4-7
    • 5.0.2+git20231211.1364ae4-8
    • 5.0.2+git20231211.1364ae4-9
    • 5.0.2-5
    • 5.0.2-5+deb12u1
    • 5.0.2-5+deb12u2
    • 5.0.2-5+deb12u3
    • 5.0.2-5+deb12u4
    • 5.0.2-5+deb12u5
    • 5.0.2-5+deb12u6
    • 5.0.2-6
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • lxd Debian:13

    Versions
    • 5.0.2+git20231211.1364ae4-9
    • 5.0.2+git20231211.1364ae4-9+deb13u1
    • 5.0.2+git20231211.1364ae4-9+deb13u2
    • 5.0.2+git20231211.1364ae4-9+deb13u3
    • 5.0.2+git20231211.1364ae4-9+deb13u4
    • 5.0.2+git20231211.1364ae4-9+deb13u5
    • 5.0.2+git20231211.1364ae4-9+deb13u6
    • 5.0.2+git20231211.1364ae4-9+deb13u7
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • lxd Ubuntu:Pro:16.04:LTS

    Versions
    • 0.20-0ubuntu4
    • 0.21-0ubuntu3
    • 0.21-0ubuntu5
    • 0.22-0ubuntu1
    • 0.22-0ubuntu2
    • 0.23-0ubuntu1
    • 0.23-0ubuntu2
    • 0.23-0ubuntu3
    • 0.24-0ubuntu2
    • 0.24-0ubuntu3
    • 0.24-0ubuntu4
    • 0.25-0ubuntu1
    • 0.26-0ubuntu2
    • 0.26-0ubuntu3
    • 0.27-0ubuntu1
    • 0.27-0ubuntu2
    • 2.0.0~beta1-0ubuntu3
    • 2.0.0~beta1-0ubuntu4
    • 2.0.0~beta2-0ubuntu1
    • 2.0.0~beta2-0ubuntu2
    • 2.0.0~beta3-0ubuntu1
    • 2.0.0~beta3-0ubuntu2
    • 2.0.0~beta3-0ubuntu3
    • 2.0.0~beta3-0ubuntu4
    • 2.0.0~beta4-0ubuntu1
    • 2.0.0~beta4-0ubuntu2
    • 2.0.0~beta4-0ubuntu3
    • 2.0.0~beta4-0ubuntu4
    • 2.0.0~beta4-0ubuntu5
    • 2.0.0~beta4-0ubuntu6
    • 2.0.0~beta4-0ubuntu7
    • 2.0.0~rc1-0ubuntu1
    • 2.0.0~rc1-0ubuntu2
    • 2.0.0~rc1-0ubuntu3
    • 2.0.0~rc2-0ubuntu2
    • 2.0.0~rc2-0ubuntu3
    • 2.0.0~rc3-0ubuntu1
    • 2.0.0~rc3-0ubuntu2
    • 2.0.0~rc3-0ubuntu3
    • 2.0.0~rc3-0ubuntu4
    • 2.0.0~rc4-0ubuntu1
    • 2.0.0~rc5-0ubuntu1
    • 2.0.0~rc6-0ubuntu1
    • 2.0.0~rc6-0ubuntu2
    • 2.0.0~rc7-0ubuntu1
    • 2.0.0~rc7-0ubuntu2
    • 2.0.0~rc8-0ubuntu1
    • 2.0.0~rc8-0ubuntu2
    • 2.0.0~rc8-0ubuntu3
    • 2.0.0~rc8-0ubuntu5
    • 2.0.0~rc8-0ubuntu6
    • 2.0.0~rc8-0ubuntu7
    • 2.0.0~rc9-0ubuntu2
    • 2.0.0~rc9-0ubuntu3
    • 2.0.0~rc9-0ubuntu4
    • 2.0.0~rc9-0ubuntu5
    • 2.0.0-0ubuntu1
    • 2.0.0-0ubuntu2
    • 2.0.0-0ubuntu3
    • 2.0.0-0ubuntu4
    • 2.0.1-0ubuntu1~16.04.1
    • 2.0.2-0ubuntu1~16.04.1
    • 2.0.3-0ubuntu1~ubuntu16.04.2
    • 2.0.4-0ubuntu1~ubuntu16.04.1
    • 2.0.5-0ubuntu1~ubuntu16.04.1
    • 2.0.8-0ubuntu1~ubuntu16.04.1
    • 2.0.8-0ubuntu1~ubuntu16.04.2
    • 2.0.9-0ubuntu1~16.04.1
    • 2.0.9-0ubuntu1~16.04.2
    • 2.0.10-0ubuntu1~16.04.1
    • 2.0.10-0ubuntu1~16.04.2
    • 2.0.11-0ubuntu1~16.04.2
    • 2.0.11-0ubuntu1~16.04.4
    • 2.0.11-0ubuntu1~16.04.4+esm1
    • 2.0.11-0ubuntu1~16.04.4+esm2
    • 2.0.11-0ubuntu1~16.04.4+esm3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • lxd Ubuntu:Pro:18.04:LTS

    Versions
    • 2.18-0ubuntu6
    • 2.19-0ubuntu1
    • 2.20-0ubuntu3
    • 2.20-0ubuntu4
    • 2.21-0ubuntu1
    • 2.21-0ubuntu2
    • 2.21-0ubuntu3
    • 2.21-0ubuntu4
    • 3.0.0~beta2-0ubuntu3
    • 3.0.0~beta3-0ubuntu3
    • 3.0.0~beta5-0ubuntu2
    • 3.0.0~beta7-0ubuntu1
    • 3.0.0-0ubuntu1
    • 3.0.0-0ubuntu2
    • 3.0.0-0ubuntu3
    • 3.0.0-0ubuntu4
    • 3.0.1-0ubuntu1~18.04.1
    • 3.0.2-0ubuntu1~18.04.1
    • 3.0.3-0ubuntu1~18.04.1
    • 3.0.3-0ubuntu1~18.04.2
    • 3.0.3-0ubuntu1~18.04.2+esm1
    • 3.0.3-0ubuntu1~18.04.2+esm2
    • 3.0.3-0ubuntu1~18.04.2+esm3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • lxd Ubuntu:20.04:LTS

    Versions
    • 1:0.7
    • 1:0.8
    • 1:0.9
    • 1:0.10
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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