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CVE-2026-12411— Broken Access Control in Canonical LXD DevLXD API

Quick assessment

Affected
Canonical lxd
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Canonical LXD是英国Canonical公司开源的一款基于Linux系统用于管理应用程序的容器。 Canonical LXD存在授权问题漏洞，该漏洞源于devLXDInstancePatchHandler组件中的访问控制问题，当security.devlxd.management.volumes启用时，可能导致不受信任的访客通过/dev/lxd上的特制设备PATCH请求挂载、读取和覆盖另一个访客的自定义存储卷。

CVSS 8.4 · High EPSS 0.29% · P19

Affected Version Matrix 1

VendorProduct Version RangeStatus
Canonical lxd 6.6< 6.9 affected
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I. Basic Information for CVE-2026-12411

Vulnerability Information
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Vulnerability Title
Broken Access Control in Canonical LXD DevLXD API
Source: CVE Program / CVE List V5
Vulnerability Description
Broken Access Control in the devLXDInstancePatchHandler component of Canonical LXD allows an untrusted guest to mount, read, and overwrite another guest's custom storage volume via a crafted device PATCH request over /dev/lxd when security.devlxd.management.volumes is enabled.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
Canonical LXD 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Canonical LXD是英国Canonical公司开源的一款基于Linux系统用于管理应用程序的容器。 Canonical LXD存在授权问题漏洞，该漏洞源于devLXDInstancePatchHandler组件中的访问控制问题，当security.devlxd.management.volumes启用时，可能导致不受信任的访客通过/dev/lxd上的特制设备PATCH请求挂载、读取和覆盖另一个访客的自定义存储卷。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Canonical lxd 6.6 ~ 6.9 -

II. Public POCs for CVE-2026-12411

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9439 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-12411

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Patches & Fixes for CVE-2026-12411 (1)

Vendor Advisories for CVE-2026-12411 (1)

Same Patch Batch · Canonical · 2026-06-26 · 4 CVEs total

CVE-2026-9640 7.2 HIGH LXD Snapshot Import Privilege Escalation Vulnerability
CVE-2026-9639 6.5 MEDIUM Authenticated Denial of Service via Malicious Backup Tarball in LXD
CVE-2026-28385 5.0 MEDIUM SSRF via image import from URL allows internal network probing by authenticated users

IV. Related Vulnerabilities

Same product: lxd
Same vendor: Canonical
Same weakness: CWE-639

V. Comments for CVE-2026-12411

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