CVE-2026-33945

{"id": "CVE-2026-33945", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.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}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.6, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 5.8, "exploitabilityScore": 3.1}]}, "published": "2026-03-27T00:16:23.633", "references": [{"url": "https://github.com/lxc/incus/security/advisories/GHSA-q4q8-7f2j-9h9f", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-22"}]}], "descriptions": [{"lang": "en", "value": "Incus is a system container and virtual machine manager. Incus instances have an option to provide credentials to systemd in the guest. For containers, this is handled through a shared directory. Prior to version 6.23.0, an attacker can set a configuration key named something like `systemd.credential.../../../../../../root/.bashrc` to cause Incus to write outside of the `credentials` directory associated with the container. This makes use of the fact that the Incus syntax for such credentials is `systemd.credential.XYZ` where `XYZ` can itself contain more periods. While it's not possible to read any data this way, it's possible to write to arbitrary files as root, enabling both privilege escalation and denial of service attacks. Version 6.23.0 fixes the issue."}, {"lang": "es", "value": "Incus es un gestor de contenedores de sistema y de m\u00e1quinas virtuales. Las instancias de Incus tienen una opci\u00f3n para proporcionar credenciales a systemd en el invitado. Para los contenedores, esto se gestiona a trav\u00e9s de un directorio compartido. Antes de la versi\u00f3n 6.23.0, un atacante puede establecer una clave de configuraci\u00f3n con un nombre similar a systemd.credential.../../../../../../root/.bashrc para hacer que Incus escriba fuera del directorio 'credentials' asociado con el contenedor. Esto aprovecha el hecho de que la sintaxis de Incus para dichas credenciales es systemd.credential.XYZ, donde XYZ puede contener m\u00e1s puntos. Si bien no es posible leer ning\u00fan dato de esta manera, es posible escribir en archivos arbitrarios como root, lo que permite tanto la escalada de privilegios como los ataques de denegaci\u00f3n de servicio. La versi\u00f3n 6.23.0 corrige el problema."}], "lastModified": "2026-04-01T16:08:28.247", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:linuxcontainers:incus:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CBE3ABCB-1D47-4A45-A09A-C9F609C53131", "versionEndExcluding": "6.23.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}