{"attribution":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","cve":{"id":"CVE-2026-58093","sourceIdentifier":"secteam@freebsd.org","published":"2026-08-26T06:16:26.227","lastModified":"2026-09-24T13:25:33.060","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"The TIOCSCTTY ioctl handler drops the tty lock in order to acquire the process tree lock.  After reacquiring the tty lock, the handler did not revalidate the state of the terminal, and could proceed to link a terminal that was concurrently being destroyed to the calling process' session.\n\nAn unprivileged local user can exploit this race condition to escalate privileges."}],"affected":[{"source":"secteam@freebsd.org","affectedData":[{"vendor":"FreeBSD","product":"FreeBSD","defaultStatus":"unknown","modules":["tty"],"versions":[{"version":"15.1-RELEASE","lessThan":"p3","versionType":"release","status":"affected"},{"version":"15.0-RELEASE","lessThan":"p13","versionType":"release","status":"affected"},{"version":"14.4-RELEASE","lessThan":"p9","versionType":"release","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.0,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.0,"impactScore":5.9}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-08-26T00:00:00+00:00","id":"CVE-2026-58093","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"secteam@freebsd.org","type":"Secondary","description":[{"lang":"en","value":"CWE-362"},{"lang":"en","value":"CWE-416"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:14.4:p1:*:*:*:*:*:*","matchCriteriaId":"D9CC0037-3282-42C3-80D8-F6C1D43B9332"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:14.4:p2:*:*:*:*:*:*","matchCriteriaId":"1EADA828-3C20-43C0-A0CA-3AC7D7F23DBD"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:14.4:p3:*:*:*:*:*:*","matchCriteriaId":"53D73FD2-4B06-47D3-BA2A-4363E9DE3565"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:14.4:p4:*:*:*:*:*:*","matchCriteriaId":"D726890B-E679-43A9-A211-D5C05BBE3941"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:14.4:p5:*:*:*:*:*:*","matchCriteriaId":"CBE94635-5277-4050-8098-F062091F6596"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:14.4:p6:*:*:*:*:*:*","matchCriteriaId":"A66308E4-DA6E-48DB-86E5-A503EE110EAD"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:14.4:p7:*:*:*:*:*:*","matchCriteriaId":"59EF67B4-E572-483B-BC9E-B2D3D8DF19CE"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:14.4:p8:*:*:*:*:*:*","matchCriteriaId":"B47E6FB0-4176-449D-9955-09A236E9F5BC"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.0:p1:*:*:*:*:*:*","matchCriteriaId":"AA4AAA57-70A7-4717-ACF2-A253E757FF2C"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.0:p10:*:*:*:*:*:*","matchCriteriaId":"683CEB32-A634-4363-86FB-2BDC59724E3E"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.0:p11:*:*:*:*:*:*","matchCriteriaId":"9EC8EE3F-9992-4A0F-A0CD-3B44BA086BD2"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.0:p12:*:*:*:*:*:*","matchCriteriaId":"CC1797AB-83A6-4379-865F-8AD495EACEEC"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.0:p2:*:*:*:*:*:*","matchCriteriaId":"E24ABFA6-4D12-4DE5-832B-438502C7D188"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.0:p3:*:*:*:*:*:*","matchCriteriaId":"C1C9869C-494B-4628-9AA3-4AA5B989C377"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.0:p4:*:*:*:*:*:*","matchCriteriaId":"002AA2FE-C7BA-471A-9434-0E56A878ACBF"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.0:p5:*:*:*:*:*:*","matchCriteriaId":"B187670D-E3A2-4A0D-A653-982F8B447E78"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.0:p6:*:*:*:*:*:*","matchCriteriaId":"047E7EE9-FB51-4CF2-A8BE-484BFD819565"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.0:p7:*:*:*:*:*:*","matchCriteriaId":"2C9768AE-9954-4B2A-9525-D7D4942406E7"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.0:p8:*:*:*:*:*:*","matchCriteriaId":"F8B9EF55-3755-452A-B067-043803099B22"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.0:p9:*:*:*:*:*:*","matchCriteriaId":"EE3C4F40-A117-4B37-8CDD-096A1A763630"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.1:p1:*:*:*:*:*:*","matchCriteriaId":"E379873C-DA04-4EAA-ABF6-EB87B4B471A8"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.1:p2:*:*:*:*:*:*","matchCriteriaId":"044A3D39-A2AF-499C-8434-0A07B5854661"}]}]}],"references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:62.tty.asc","source":"secteam@freebsd.org","tags":["Vendor Advisory"]}]}}