CVE-2026-12411

CRITICALNVD 9.69.6—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.6 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 89% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.6Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
9.6
EG Score
9.6(medium)
EPSS
11.0%
KEV
Not listed

Published

June 26, 2026

Last Modified

July 2, 2026

Advisory Details (2)

Auto-updated Jun 26, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr, github.
github Patch Available🟡 PoC Available

Cross-guest volume hijack via DevLXD device patch · Advisory · canonical/lxd · GitHub

https://github.com/canonical/lxd/security/advisories/GHSA-hhf9-qw4v-72xp
github_pr

Security fixes from the 6.9 release

Fix merged in canonical/lxd PR #18585 on 2026-06-26 — awaiting tagged release

https://github.com/canonical/lxd/pull/18585

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 49× in last 7d / 91× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-12 22:40 UTCEG score recompute
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  45. 2026-07-03 01:02 UTCEG score recompute▲ 1.20
  46. 2026-07-02 16:57 UTCNVD updateCVSS v3 → 9.6 · severity → CRITICAL
  47. 2026-07-02 12:24 UTCEG score recompute
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  65. 2026-06-26 17:42 UTCEG score recompute
  66. 2026-06-26 17:41 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-12411?
CVE-2026-12411 is a critical vulnerability published on June 26, 2026. 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.
When was CVE-2026-12411 disclosed?
CVE-2026-12411 was first published in the National Vulnerability Database on June 26, 2026, with the most recent update on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12411 actively exploited?
CVE-2026-12411 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 11.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-12411?
CVE-2026-12411 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2026-12411?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12411, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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