CVE-2026-40197

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In the snapshot import loop, the daemon iterates over entries from `srcBackup.Config.VolumeSnapshots` and assumes that each slice element is initialized, then dereferences fields such as `Name`, `Config`, `Description`, `CreatedAt`, and `ExpiresAt` without first validating the element itself. Because the yaml unmarshaler accepts explicit null array elements from an attacker-controlled index.yaml and converts them into nil pointers inside the slice, an attacker can supply a backup archive containing a null entry in the volume_snapshots array. This causes a nil-pointer dereference during custom volume import and terminates the daemon, resulting in denial of service on the affected node. Repeated use of this issue can be used to keep Incus offline, causing a denial of service. This issue is fixed in version 7.0.0."}, {"lang": "es", "value": "Incus es un gestor de contenedores de sistema y m\u00e1quinas virtuales. En versiones anteriores a la 7.0.0, la l\u00f3gica de validaci\u00f3n faltante en la l\u00f3gica de importaci\u00f3n de vol\u00famenes de almacenamiento permite a un usuario autenticado con acceso a la caracter\u00edstica de volumen de almacenamiento provocar que el demonio de Incus falle. El subsistema de importaci\u00f3n de copias de seguridad de vol\u00famenes personalizados contiene una vulnerabilidad de desreferencia de puntero nulo durante las operaciones de importaci\u00f3n. En el bucle de importaci\u00f3n de instant\u00e1neas, el demonio itera sobre las entradas de \u201csrcBackup.Config.VolumeSnapshots\u201d y asume que cada elemento de la porci\u00f3n est\u00e1 inicializado, luego desreferencia campos como \u201cName\u201d, \u201cConfig\u201d, \u201cDescription\u201d, \u201cCreatedAt\u201d y \u201cExpiresAt\u201d sin validar primero el elemento en s\u00ed. Debido a que el desmarshalizador de yaml acepta elementos de matriz nulos expl\u00edcitos de un index.yaml controlado por el atacante y los convierte en punteros nulos dentro de la porci\u00f3n, un atacante puede proporcionar un archivo de copia de seguridad que contenga una entrada nula en la matriz volume_snapshots. Esto provoca una desreferencia de puntero nulo durante la importaci\u00f3n de vol\u00famenes personalizados y termina el demonio, lo que resulta en una denegaci\u00f3n de servicio en el nodo afectado. El uso repetido de este problema puede utilizarse para mantener Incus fuera de l\u00ednea, causando una denegaci\u00f3n de servicio. Este problema est\u00e1 solucionado en la versi\u00f3n 7.0.0."}], "id": "CVE-2026-40197", "lastModified": "2026-10-26T19:10:00.163", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40197", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-07T13:21:46.355736Z", "version": "2.0.3"}}]}, "published": "2026-05-06T21:16:00.930", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/lxc/incus/security/advisories/GHSA-r7w7-mmxr-47r9"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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