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9.1 Critique

CVE-2026-34177 Canonical LXD versions 4.12 through 6.7 contain an incomplete denylist in isVMLowLevelOptionForbidden…

Description

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.

Produits et versions touchés

Produit Versions touchées Corrigé en
LXD 6.0 6.0.0 → < 6.8.0 6.8.0
LXD 5.1 5.1.0 → < 5.21.5 5.21.5
LXD 4.12 4.12.0 → < 5.0.7 5.0.7

Références

Chronologie

  1. Publiée
  2. Dernière modification

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