CVE-2026-34177
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.
- CVSS 3.1
- 9.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H - EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 29% of CVEs (scores of 2026-10-26)
- CWE
- CWE-184
- Published
- Modified
- Record from
- the NVD, synced
Affected
- canonical:lxd
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-fm2x-c5qw-4h6f | Go | github.com/canonical/lxd | >=0.0.0-20210305023314-538ac3df036e <=0.0.0-20260226085519-736f34afb267 | no fix published |
| GO-2026-5368 | Go | github.com/canonical/lxd | >=0.0.0-20210305023314-538ac3df036e | no fix published |