UBUNTU-CVE-2026-34177
- Source
- https://ubuntu.com/security/CVE-2026-34177
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34177.json
- JSON Data
- https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-34177
- Upstream
- Published
- 2026-04-09T10:16:00Z
- Modified
- 2026-04-28T16:39:17.324435Z
- Severity
-
- 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
- Ubuntu - medium
- Summary
- [none]
- Details
-
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.
- References
Affected packages
Ubuntu:Pro:24.04:LTS / incus
Package
- Name
- incus
- Purl
- pkg:deb/ubuntu/incus@6.0.0-1ubuntu0.3+esm3?arch=source&distro=esm-apps/noble
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affected
Affected versions
0.*
0.4-1ubuntu1
0.5.1-1
0.5.1-3
0.6-1
6.*
6.0.0-1
6.0.0-1ubuntu0.1
6.0.0-1ubuntu0.2
6.0.0-1ubuntu0.2+esm1
6.0.0-1ubuntu0.3
6.0.0-1ubuntu0.3+esm1
6.0.0-1ubuntu0.3+esm2
6.0.0-1ubuntu0.3+esm3
Ecosystem specific
{
"binaries": [
{
"binary_name": "golang-github-lxc-incus-dev",
"binary_version": "6.0.0-1ubuntu0.3+esm3"
},
{
"binary_name": "incus",
"binary_version": "6.0.0-1ubuntu0.3+esm3"
},
{
"binary_name": "incus-agent",
"binary_version": "6.0.0-1ubuntu0.3+esm3"
},
{
"binary_name": "incus-client",
"binary_version": "6.0.0-1ubuntu0.3+esm3"
},
{
"binary_name": "incus-migrate",
"binary_version": "6.0.0-1ubuntu0.3+esm3"
},
{
"binary_name": "incus-tools",
"binary_version": "6.0.0-1ubuntu0.3+esm3"
}
]
}