{"id":"CVE-2026-35355","sourceIdentifier":"security@ubuntu.com","published":"2026-04-22T17:16:37.993","lastModified":"2026-10-26T21:10:00.170","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"The install utility in uutils coreutils is vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race condition during file installation. The implementation unlinks an existing destination file and then recreates it using a path-based operation without the O_EXCL flag. A local attacker can exploit the window between the unlink and the subsequent creation to swap the path with a symbolic link, allowing them to redirect privileged writes to overwrite arbitrary system files."},{"lang":"es","value":"La utilidad install en uutils coreutils es vulnerable a una condición de carrera de tipo Time-of-Check to Time-of-Use (TOCTOU) durante la instalación de archivos. La implementación desvincula un archivo de destino existente y luego lo recrea utilizando una operación basada en ruta sin la bandera O_EXCL. Un atacante local puede explotar la ventana entre la desvinculación y la creación subsiguiente para intercambiar la ruta con un enlace simbólico, permitiéndoles redirigir escrituras privilegiadas para sobrescribir archivos de sistema arbitrarios."}],"affected":[{"source":"security@ubuntu.com","affectedData":[{"vendor":"Uutils","product":"coreutils","defaultStatus":"unaffected","collectionURL":"https://github.com/uutils","packageName":"coreutils","platforms":["Linux","Unix","macOS"],"repo":"https://github.com/uutils/coreutils","versions":[{"version":"0","lessThan":"0.6.0","versionType":"semver","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security@ubuntu.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H","baseScore":6.3,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.0,"impactScore":5.2}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-04-22T18:01:44.426332Z","id":"CVE-2026-35355","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security@ubuntu.com","type":"Secondary","description":[{"lang":"en","value":"CWE-367"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:uutils:coreutils:*:*:*:*:*:rust:*:*","versionEndExcluding":"0.6.0","matchCriteriaId":"87C33018-2E08-45B0-B69C-7FC224F7F883"}]}]}],"references":[{"url":"https://github.com/uutils/coreutils/pull/10067","source":"security@ubuntu.com","tags":["Exploit","Issue Tracking","Patch"]},{"url":"https://github.com/uutils/coreutils/releases/tag/0.6.0","source":"security@ubuntu.com","tags":["Release Notes"]},{"url":"https://github.com/uutils/coreutils/pull/10067","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Exploit","Issue Tracking","Patch"]}]}