CVE-2026-34177
LXD: VM lowlevel restriction bypass via raw.apparmor and raw.qemu.conf
9.1
CRITICAL
CVSS 3.1
EPSS 0.36%
描述
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.
如何修補 CVE-2026-34177
要修補 CVE-2026-34177,請將受影響套件升級到下列已修補版本。
- —升級至 6.0.2-1 或更新版本
- —未列出修補版本
CVE-2026-34177 正在被利用嗎?
低 — EPSS 為 0.4%,目前沒有觀察到大規模利用活動。
受影響套件(2)
- from 0, < 6.0.2-1
- from 0
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |