{"id":"CVE-2026-12411","title":"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 securi…","summary":"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 securi…","severity":"high","cvss":8.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","cwe":["CWE-639","CWE-862"],"vendor":"canonical","product":"lxd","affected":["lxd >= 6.6, < 6.9"],"patched":["lxd 6.9"],"published":"2026-06-26","updated":"2026-07-02","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-12411","references":[{"url":"https://github.com/canonical/lxd/pull/18585","label":"security@ubuntu.com"},{"url":"https://github.com/canonical/lxd/security/advisories/GHSA-hhf9-qw4v-72xp","label":"security@ubuntu.com"},{"url":"https://github.com/canonical/lxd/security/advisories/GHSA-hhf9-qw4v-72xp","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00288,"epssPercentile":0.21605,"ingestedAt":"2026-07-03T13:02:28.081Z","slug":"CVE-2026-12411","body":"## Overview\n\nBroken 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.\n\n## Affected\n\n- `lxd >= 6.6, < 6.9`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `lxd 6.9`","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":46.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}