CVE-2026-35372

{"id": "CVE-2026-35372", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-35372", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-22T17:21:07.778700Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security@ubuntu.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.0, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.3}]}, "affected": [{"source": "security@ubuntu.com", "affectedData": [{"repo": "https://github.com/uutils/coreutils", "vendor": "Uutils", "product": "coreutils", "versions": [{"status": "affected", "version": "0", "lessThan": "0.8.0", "versionType": "semver"}], "platforms": ["Linux", "Unix", "macOS"], "packageName": "coreutils", "collectionURL": "https://github.com/uutils", "defaultStatus": "unaffected"}]}], "published": "2026-04-22T17:16:41.850", "references": [{"url": "https://github.com/uutils/coreutils/pull/11253", "tags": ["Issue Tracking", "Patch"], "source": "security@ubuntu.com"}, {"url": "https://github.com/uutils/coreutils/releases/tag/0.8.0", "tags": ["Release Notes"], "source": "security@ubuntu.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@ubuntu.com", "description": [{"lang": "en", "value": "CWE-61"}]}], "descriptions": [{"lang": "en", "value": "A logic error in the ln utility of uutils coreutils allows the utility to dereference a symbolic link target even when the --no-dereference (or -n) flag is explicitly provided. The implementation previously only honored the \"no-dereference\" intent if the --force (overwrite) mode was also enabled. This flaw causes ln to follow a symbolic link that points to a directory and create new links inside that target directory instead of treating the symbolic link itself as the destination. In environments where a privileged user or system script uses ln -n to update a symlink, a local attacker could manipulate existing symbolic links to redirect file creation into sensitive directories, potentially leading to unauthorized file creation or system misconfiguration."}, {"lang": "es", "value": "Un error de l\u00f3gica en la utilidad ln de uutils coreutils permite a la utilidad desreferenciar un objetivo de enlace simb\u00f3lico incluso cuando la bandera --no-dereference (o -n) se proporciona expl\u00edcitamente. La implementaci\u00f3n anteriormente solo respetaba la intenci\u00f3n de \u2019no desreferenciar\u2019 si el modo --force (sobrescribir) tambi\u00e9n estaba habilitado. Esta falla hace que ln siga un enlace simb\u00f3lico que apunta a un directorio y cree nuevos enlaces dentro de ese directorio objetivo en lugar de tratar el propio enlace simb\u00f3lico como el destino. En entornos donde un usuario privilegiado o un script del sistema utiliza ln -n para actualizar un enlace simb\u00f3lico, un atacante local podr\u00eda manipular enlaces simb\u00f3licos existentes para redirigir la creaci\u00f3n de archivos hacia directorios sensibles, lo que podr\u00eda llevar a la creaci\u00f3n de archivos no autorizados o a una mala configuraci\u00f3n del sistema."}], "lastModified": "2026-10-26T21:10:00.170", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:uutils:coreutils:*:*:*:*:*:rust:*:*", "vulnerable": true, "matchCriteriaId": "2365DBBD-6F10-4651-8DA4-08AE79E14423", "versionEndExcluding": "0.8.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@ubuntu.com"}