CVE-2026-63297

{"id": "CVE-2026-63297", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-63297", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-13T14:28:52.383092Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security@ubuntu.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.9, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 3.1}]}, "affected": [{"source": "security@ubuntu.com", "affectedData": [{"repo": "https://github.com/canonical/lxd", "vendor": "Canonical", "product": "LXD", "versions": [{"status": "affected", "version": "5.0.0", "lessThan": "5.0.8", "versionType": "semver"}, {"status": "affected", "version": "5.21.0", "lessThan": "5.21.6", "versionType": "semver"}], "platforms": ["Linux"], "packageName": "LXD", "defaultStatus": "unaffected"}]}], "published": "2026-08-12T20:17:47.583", "references": [{"url": "https://github.com/canonical/lxd/security/advisories/GHSA-v989-qw7w-xvg4", "tags": ["Vendor Advisory", "Exploit", "Mitigation"], "source": "security@ubuntu.com"}, {"url": "https://github.com/canonical/lxd/security/advisories/GHSA-v989-qw7w-xvg4", "tags": ["Vendor Advisory", "Exploit", "Mitigation"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@ubuntu.com", "description": [{"lang": "en", "value": "CWE-367"}, {"lang": "en", "value": "CWE-863"}]}], "descriptions": [{"lang": "en", "value": "An authorization bypass vulnerability in LXD due to a timing flaw during configuration merging allows an authenticated attacker to bypass target project restrictions during cross-project instance copies. When copying an instance to a target project, LXD performs restriction checks before configuration merging is complete, creating a time-of-check to time-of-use (TOCTOU) condition. An attacker can exploit this flaw to copy instances with disallowed high-privilege configurations into restricted projects, bypassing security controls."}, {"lang": "es", "value": "Una vulnerabilidad de omisi\u00f3n de autorizaci\u00f3n en LXD debido a un fallo de temporizaci\u00f3n durante la fusi\u00f3n de configuraci\u00f3n permite a un atacante autenticado omitir las restricciones del proyecto de destino durante las copias de instancias entre proyectos. Al copiar una instancia a un proyecto de destino, LXD realiza comprobaciones de restricci\u00f3n antes de que se complete la fusi\u00f3n de configuraci\u00f3n, creyo una condici\u00f3n de tiempo de verificaci\u00f3n a tiempo de uso (TOCTOU). Un atacante puede explotar este fallo para copiar instancias con configuraciones de alto privilegio no permitidas en proyectos restringidos, omitiendo los controles de seguridad."}], "lastModified": "2026-10-24T16:10:00.153", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "59D070D6-84D2-400E-8260-EA52E5C60D37", "versionEndExcluding": "5.0.8", "versionStartIncluding": "5.0.0"}, {"criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "575036D1-2B55-4043-B94A-1584E3F2DA37", "versionEndExcluding": "5.21.6", "versionStartIncluding": "5.1"}, {"criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C25E18E8-CDDF-4F3A-A80E-F27456981A4B", "versionEndExcluding": "6.9", "versionStartIncluding": "6.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@ubuntu.com"}