CVE-2026-34177
CRITICAL
9,1
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: high
User Interaction: none
Scope: changed
Confidentiality: high
Integrity: high
Availability: high
Description
AI Translation Available
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.
EPSS (Exploit Prediction Scoring System)
Trend Analysis
EPSS (Exploit Prediction Scoring System)
Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.
EPSS Score
0,0010
Percentile
0,3th
Updated
EPSS Score Trend (Last 8 Days)
184
Incomplete List of Disallowed Inputs
DraftCommon Consequences
Security Scopes Affected:
Access Control
Potential Impacts:
Bypass Protection Mechanism
Applicable Platforms
All platforms may be affected
https://github.com/canonical/lxd/security/advisories/GHSA-fm2x-c5qw-4h6f
https://github.com/canonical/lxd/pull/17909
https://github.com/canonical/lxd/security/advisories/GHSA-fm2x-c5qw-4h6f