{"id":"CVE-2026-35352","state":"PUBLISHED","title":"uutils coreutils mkfifo Privilege Escalation via TOCTOU Race Condition","description":"A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mkfifo utility of uutils coreutils. The utility creates a FIFO and then performs a path-based chmod to set permissions. A local attacker with write access to the parent directory can swap the newly created FIFO for a symbolic link between these two operations. This redirects the chmod call to an arbitrary file, potentially enabling privilege escalation if the utility is run with elevated privileges.","publishedAt":"2026-04-22T16:08:07.422Z","updatedAt":"2026-05-04T17:32:54.701Z","severity":{"score":7,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"canonical"},"assigner":"canonical","products":["Uutils coreutils"],"affected":[{"vendor":"Uutils","product":"coreutils","packageName":"coreutils","defaultStatus":"affected","platforms":["Linux","Unix","macOS"],"collectionURL":"https://github.com/uutils","repo":"https://github.com/uutils/coreutils"}],"references":["https://github.com/uutils/coreutils/issues/10020","http://www.openwall.com/lists/oss-security/2026/05/04/4","http://www.openwall.com/lists/oss-security/2026/05/04/5","http://www.openwall.com/lists/oss-security/2026/05/04/6"],"weaknesses":["CWE-367"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/35xxx/CVE-2026-35352.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-35352","state":"PUBLISHED","datePublished":"2026-04-22T16:08:07.422Z","dateUpdated":"2026-05-04T17:32:54.701Z","assignerShortName":"canonical","assignerOrgId":"cc1ad9ee-3454-478d-9317-d3e869d708bc","dateReserved":"2026-04-02T12:58:56.087Z"},"containers":{"cna":{"title":"uutils coreutils mkfifo Privilege Escalation via TOCTOU Race Condition","descriptions":[{"lang":"en","value":"A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mkfifo utility of uutils coreutils. The utility creates a FIFO and then performs a path-based chmod to set permissions. A local attacker with write access to the parent directory can swap the newly created FIFO for a symbolic link between these two operations. This redirects the chmod call to an arbitrary file, potentially enabling privilege escalation if the utility is run with elevated privileges."}],"affected":[{"vendor":"Uutils","product":"coreutils","packageName":"coreutils","defaultStatus":"affected","platforms":["Linux","Unix","macOS"],"collectionURL":"https://github.com/uutils","repo":"https://github.com/uutils/coreutils"}],"references":[{"url":"https://github.com/uutils/coreutils/issues/10020","tags":["issue-tracking"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseSeverity":"HIGH","baseScore":7,"vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-367","lang":"en","description":"CWE-367: Time-of-Check Time-of-Use (TOCTOU) Race Condition","type":"CWE"}]}],"providerMetadata":{"shortName":"canonical","orgId":"cc1ad9ee-3454-478d-9317-d3e869d708bc","dateUpdated":"2026-04-22T16:08:07.422Z"},"impacts":[{"capecId":"CAPEC-29","descriptions":[{"lang":"en","value":"CAPEC-29: Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions"}]}],"credits":[{"lang":"en","value":"Zellic","type":"finder"}],"source":{"discovery":"EXTERNAL"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/uutils/coreutils/issues/10020","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-24T13:42:47.744415Z","id":"CVE-2026-35352","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-24T13:42:55.541Z"}},{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/05/04/4"},{"url":"http://www.openwall.com/lists/oss-security/2026/05/04/5"},{"url":"http://www.openwall.com/lists/oss-security/2026/05/04/6"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-05-04T17:32:54.701Z"}}]}}}