CVE-2026-34177
critical · 9.1Canonical 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.
9.1
CVSS
0.4%
EPSS (exploit prob.)
30th
EPSS percentile
2026-04-09
Published
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Weaknesses
CWE-184
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| canonical | lxd | >= 4.12, <= 5.0.6 |
| canonical | lxd | >= 5.21.0, <= 5.21.4 |
| canonical | lxd | >= 6.0, <= 6.7 |
Check a specific version with /api/v1/cve/match.
References
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2026-34177