{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-35355","assignerOrgId":"cc1ad9ee-3454-478d-9317-d3e869d708bc","state":"PUBLISHED","assignerShortName":"canonical","dateReserved":"2026-04-02T12:58:56.087Z","datePublished":"2026-04-22T16:08:14.960Z","dateUpdated":"2026-04-22T18:01:47.122Z"},"containers":{"cna":{"title":"uutils coreutils install Arbitrary File Overwrite via Symlink TOCTOU Race","affected":[{"vendor":"Uutils","product":"coreutils","platforms":["Linux","Unix","macOS"],"collectionURL":"https://github.com/uutils","packageName":"coreutils","repo":"https://github.com/uutils/coreutils","versions":[{"status":"affected","lessThan":"0.6.0","version":"0","versionType":"semver"}],"defaultStatus":"unaffected"}],"problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-367","description":"CWE-367: Time-of-Check Time-of-Use (TOCTOU) Race Condition","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-29","descriptions":[{"lang":"en","value":"CAPEC-29: Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions"}]}],"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."}],"references":[{"url":"https://github.com/uutils/coreutils/pull/10067","tags":["issue-tracking","patch"]},{"url":"https://github.com/uutils/coreutils/releases/tag/0.6.0","tags":["vendor-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseSeverity":"MEDIUM","baseScore":6.3,"vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H"}}],"credits":[{"lang":"en","value":"Zellic","type":"finder"}],"source":{"discovery":"EXTERNAL"},"providerMetadata":{"orgId":"cc1ad9ee-3454-478d-9317-d3e869d708bc","shortName":"canonical","dateUpdated":"2026-04-22T16:08:14.960Z"}},"adp":[{"references":[{"url":"https://github.com/uutils/coreutils/pull/10067","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-22T18:01:44.426332Z","id":"CVE-2026-35355","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-22T18:01:47.122Z"}}]}}