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Untriaged
Permalink CVE-2026-34177
9.1 CRITICAL
  • CVSS version: 3.1
  • Attack vector (AV): NETWORK
  • Attack complexity (AC): LOW
  • Privileges required (PR): HIGH
  • User interaction (UI): NONE
  • Scope (S): CHANGED
  • Confidentiality impact (C): HIGH
  • Integrity impact (I): HIGH
  • Availability impact (A): HIGH
created 5 days, 9 hours ago
VM lowlevel restriction bypass via raw.apparmor and raw.qemu.conf

Canonical LXD versions 4.12 through 6.7 contain an incomplete denylist in isVMLowLevelOptionForbidden (lxd/project/limits/permissions.go), which omits raw.apparmor and raw.qemu.conf from the set of keys blocked under the restricted.virtual-machines.lowlevel=block project restriction. A remote attacker with can_edit permission on a VM instance in a restricted project can inject an AppArmor rule and a QEMU chardev configuration that bridges the LXD Unix socket into the guest VM, enabling privilege escalation to LXD cluster administrator and subsequently to host root.

Affected products

lxd
  • <5.0.7
  • <5.21.5
  • <6.8.0

Matching in nixpkgs

pkgs.lxd-ui

Web user interface for LXD

pkgs.lxd-lts

Daemon based on liblxc offering a REST API to manage containers

pkgs.lxd-image-server

Creates and manages a simplestreams lxd image server on top of nginx

pkgs.lxd-unwrapped-lts

Daemon based on liblxc offering a REST API to manage containers

Package maintainers