CVE-2026-34177

{"id": "CVE-2026-34177", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34177", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-04-09T12:12:43.482752Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security@ubuntu.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.3}]}, "affected": [{"source": "security@ubuntu.com", "affectedData": [{"repo": "https://github.com/canonical/lxd", "vendor": "Canonical", "product": "lxd", "versions": [{"status": "affected", "version": "4.12.0", "lessThan": "5.0.7", "versionType": "semver"}, {"status": "affected", "version": "5.1.0", "lessThan": "5.21.5", "versionType": "semver"}, {"status": "affected", "version": "6.0.0", "lessThan": "6.8.0", "versionType": "semver"}], "platforms": ["Linux"], "packageName": "lxd", "programFiles": ["permissions.go"], "collectionURL": "https://github.com/canonical", "defaultStatus": "unaffected"}]}], "published": "2026-04-09T10:16:21.653", "references": [{"url": "https://github.com/canonical/lxd/pull/17909", "tags": ["Issue Tracking"], "source": "security@ubuntu.com"}, {"url": "https://github.com/canonical/lxd/security/advisories/GHSA-fm2x-c5qw-4h6f", "tags": ["Third Party Advisory"], "source": "security@ubuntu.com"}, {"url": "https://github.com/canonical/lxd/security/advisories/GHSA-fm2x-c5qw-4h6f", "tags": ["Third Party Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@ubuntu.com", "description": [{"lang": "en", "value": "CWE-184"}]}], "descriptions": [{"lang": "en", "value": "Canonical LXD versions 4.12 through 6.7 contain an incomplete denylist in isVMLowLevelOptionForbidden (lxd/project/limits/permissions.go), which omits raw.apparmor and raw.qemu.conf from the set of keys blocked under the restricted.virtual-machines.lowlevel=block project restriction. A remote attacker with can_edit permission on a VM instance in a restricted project can inject an AppArmor rule and a QEMU chardev configuration that bridges the LXD Unix socket into the guest VM, enabling privilege escalation to LXD cluster administrator and subsequently to host root."}], "lastModified": "2026-06-17T10:38:36.340", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "41A5CC7C-00BE-436D-957A-4636E52D0DF1", "versionEndIncluding": "5.0.6", "versionStartIncluding": "4.12"}, {"criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "92A82DF4-3ED9-47E0-BDF1-DB9138EE0883", "versionEndIncluding": "5.21.4", "versionStartIncluding": "5.21.0"}, {"criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5C28FC63-0BE4-4B40-A87F-DF242AE33303", "versionEndIncluding": "6.7", "versionStartIncluding": "6.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@ubuntu.com"}