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CVE-2026-12411

Canonical Lxd broken access control

8.4 HIGHPublic exploitEPSS 0.29%
  1. Published26 Jun 2026

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.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Affected products

Canonical Lxd≥ 6.6 < 6.9

Remediation

Fixed in
Canonical Lxd≥ 6.9

References

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Frequently asked

Is CVE-2026-12411 being actively exploited?

CVE-2026-12411 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.29%.

How severe is CVE-2026-12411?

CVE-2026-12411 has a CVSS 3.1 base score of 8.4, rated high. EPSS estimates a 0.29% probability of exploitation.

Which products are affected by CVE-2026-12411?

Affected products include Canonical Lxd.

How do I fix CVE-2026-12411?

Upgrade affected software to a fixed version, for example Canonical Lxd 6.9 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-12411 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.