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Untriaged
Permalink CVE-2026-62941
9.9 CRITICAL
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): Low (L)
  • Privileges Required (PR): Low (L)
  • User Interaction (UI): None (N)
  • Scope (S): Changed (C)
  • Confidentiality (C): High (H)
  • Integrity (I): High (H)
  • Availability (A): High (H)
  • Modified Attack Vector (MAV): Network (N)
  • Modified Attack Complexity (MAC): Low (L)
  • Modified Privileges Required (MPR): Low (L)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): High (H)
  • Modified Scope (MS): Changed (C)
  • Modified Integrity (MI): High (H)
  • Modified Availability (MA): High (H)
created 3 weeks, 4 days ago Activity log
  • Created suggestion 3 weeks, 4 days ago
Incus: Cross-project instance copy bypasses target project restrictions via TOCTOU in config merge

Incus is a system container and virtual machine manager. Prior to version 7.3.0, when copying an instance across projects, the project restriction check (`AllowInstanceCreation`) runs BEFORE the source instance's configuration is merged into the request. Dangerous configuration keys (including `security.privileged`, `raw.lxc`, `raw.apparmor`) from the source instance are merged AFTER the check passes, bypassing all project restrictions on the target project. Version 7.3.0 patches the issue.

Affected products

incus
  • ==< 7.3.0

Matching in nixpkgs

pkgs.incus

Powerful system container and virtual machine manager

pkgs.incus-lts

Powerful system container and virtual machine manager

pkgs.incus-spawn

CLI tool for managing isolated Incus development environments

  • nixos-unstable -

pkgs.incus-compose

Bring the familiar Docker Compose workflow to Incus — run compose.yaml files natively on Incus

  • nixos-unstable -
    • nixos-unstable-small 1.2.0

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