How severe is CVE-2026-12411?

CVE-2026-12411 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-12411 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-12411?

CVE-2026-12411 affects Canonical Lxd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-12411?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-12411 published?

CVE-2026-12411 was published on 2026-06-26 and last updated on 2026-07-02.

CVE-2026-12411

CVE-2026-12411 is a high-severity vulnerability in Canonical Lxd with a CVSS 3.x base score of 8.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-639.

Key facts

Severity: High (CVSS 3.x base score 8.4)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-639
Affected product: Canonical Lxd
Published: 2026-06-26
Last modified: 2026-07-02

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.

Frequently asked questions

What is CVE-2026-12411?: 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.
How severe is CVE-2026-12411?: CVE-2026-12411 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-12411 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-12411?: CVE-2026-12411 affects Canonical Lxd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-12411?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-12411 published?: CVE-2026-12411 was published on 2026-06-26 and last updated on 2026-07-02.

References

Affected products (1)

cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*

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