CVE-2026-63125

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{"affected": [{"affectedData": [{"product": "incus", "vendor": "lxc", "versions": [{"status": "affected", "version": "< 7.3.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Incus is a system container and virtual machine manager. Prior to version 7.3.0, an unprivileged, project-confined Incus user (a non-admin TLS/RBAC identity with `can_create_images` and `can_create_instances`) can execute arbitrary code as root on the host. A crafted image ships `backup.yaml` as a symlink to a host file. When the root daemon writes the instance's backup file, it follows the symlink. Version 7.3.0 patches the issue."}, {"lang": "es", "value": "Incus es un gestor de contenedores de sistema y m\u00e1quinas virtuales. Antes de la versi\u00f3n 7.3.0, un usuario de Incus sin privilegios y confinado a un proyecto (una identidad TLS/RBAC no administradora con 'can_create_images' y 'can_create_instances') puede ejecutar c\u00f3digo arbitrario como root en el host. Una imagen manipulada env\u00eda 'backup.yaml' como un enlace simb\u00f3lico a un archivo del host. Cuando el demonio root escribe el archivo de copia de seguridad de la instancia, sigue el enlace simb\u00f3lico. La versi\u00f3n 7.3.0 corrige el problema."}], "id": "CVE-2026-63125", "lastModified": "2026-10-15T19:10:00.173", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.9, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 6.0, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-63125", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-21T15:02:31.652417Z", "version": "2.0.3"}}]}, "published": "2026-08-21T15:16:46.427", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/lxc/incus/security/advisories/GHSA-6rqx-22hc-qm36"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/lxc/incus/security/advisories/GHSA-6rqx-22hc-qm36"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-59"}, {"lang": "en", "value": "CWE-61"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{"bugzilla": {"description": "incus: Incus vulnerable to root RCE via image backup.yaml symlink", "id": "2521013", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2521013"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-61", "details": ["Incus is a system container and virtual machine manager. Prior to version 7.3.0, an unprivileged, project-confined Incus user (a non-admin TLS/RBAC identity with `can_create_images` and `can_create_instances`) can execute arbitrary code as root on the host. A crafted image ships `backup.yaml` as a symlink to a host file. When the root daemon writes the instance's backup file, it follows the symlink. Version 7.3.0 patches the issue.", "A flaw was found in Incus, a container and virtual machine manager. A crafted container image can trick the daemon into writing to arbitrary host files via a symlink in backup.yaml, potentially leading to root-level command execution on the host."], "mitigation": {"lang": "en:us", "value": "No mitigation is needed as Incus is not shipped in any Red Hat product."}, "name": "CVE-2026-63125", "public_date": "2026-08-21T14:49:16Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63125\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63125\nhttps://github.com/lxc/incus/security/advisories/GHSA-6rqx-22hc-qm36"], "statement": "Incus is not shipped in any Red Hat product. The community Fedora package is affected.", "threat_severity": "Critical"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,7.3.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "incus", "source": "cna", "vendor": "lxc"}, "product": "incus", "vendor": "lxc"}], "created": "2026-08-21T17:00:04.112933+00:00", "updated": "2026-08-21T17:30:03.708180+00:00", "vendors": ["lxc", "lxc$PRODUCT$incus"]}