CVE-2026-48756

{"id": "CVE-2026-48756", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-48756", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-21T20:58:24.750230Z"}}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 2.1, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "LOW", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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", "exploitMaturity": "PROOF_OF_CONCEPT", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "lxc", "product": "incus", "versions": [{"status": "affected", "version": "< 7.1.0"}]}]}], "published": "2026-08-21T15:16:41.210", "references": [{"url": "https://github.com/lxc/incus/security/advisories/GHSA-xhqx-mgh3-3h7q", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "Incus is a system container and virtual machine manager. Prior to version 7.1.0, `(*backend).CreateCustomVolumeFromBackup` in `internal/server/storage/backend.go` contains an unguarded `*time.Time` dereference on the `ExpiresAt` field of every volume-snapshot entry in an imported custom-volume backup. An authenticated user with `can_create_storage_volumes` permission on any project can crash the `incusd` daemon by uploading a backup tarball whose `volume_snapshots[*].expires_at` field is absent. This is a sibling-field variant of GHSA-r7w7-mmxr-47r9 (CVE-2026-40197). Commit `985a1dedf9f3e7ba729c93b654905ed510de25c2` added `if s == nil` at the top of the loop body, but did not guard the adjacent `*snapshot.ExpiresAt` deref 19 lines later. Every other consumer of `Config.VolumeSnapshots[i].ExpiresAt` in this same file already gates the deref with a nil-check \u2014 the asymmetric guard is the bug. Version 7.1.0 contains an updated patch."}, {"lang": "es", "value": "Incus es un gestor de contenedores de sistema y m\u00e1quinas virtuales. Antes de la versi\u00f3n 7.1.0, '(backend).CreateCustomVolumeFromBackup' en 'internal/server/storage/backend.go' contiene una desreferencia de 'time.Time' sin protecci\u00f3n en el campo 'ExpiresAt' de cada entrada de instant\u00e1nea de volumen en una copia de seguridad de volumen personalizado importada. Un usuario autenticado con permiso 'can_create_storage_volumes' en cualquier proyecto puede bloquear el demonio 'incusd' al subir un tarball de copia de seguridad cuyo campo 'volume_snapshots[*].expires_at' est\u00e1 ausente. Esta es una variante de campo hermano de GHSA-r7w7-mmxr-47r9 (CVE-2026-40197). El commit '985a1dedf9f3e7ba729c93b654905ed510de25c2' a\u00f1adi\u00f3 'if s == nil' al principio del cuerpo del bucle, pero no protegi\u00f3 la desreferencia adyacente de 'snapshot.ExpiresAt' 19 l\u00edneas m\u00e1s tarde. Cada otro consumidor de 'Config.VolumeSnapshots[i].ExpiresAt' en este mismo archivo ya protege la desreferencia con una comprobaci\u00f3n de nulo - la protecci\u00f3n asim\u00e9trica es el error. La versi\u00f3n 7.1.0 contiene un parche actualizado."}], "lastModified": "2026-10-15T19:10:00.173", "sourceIdentifier": "security-advisories@github.com"}