{"attribution":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","cve":{"id":"CVE-2026-58099","sourceIdentifier":"secteam@freebsd.org","published":"2026-10-15T07:18:02.373","lastModified":"2026-10-19T21:02:15.750","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"When copying knotes from a parent kqueue to a child, the copy code did not correctly exclude marker knotes (used internally to track list traversal position) before marking them as in-flux and releasing the kqueue lock.  If another thread freed a marker while the lock was dropped, the subsequent in-flux decrement operated on freed memory.\n\nAn unprivileged local user may be able to exploit these races to escalate privileges."}],"affected":[{"source":"secteam@freebsd.org","affectedData":[{"vendor":"FreeBSD","product":"FreeBSD","defaultStatus":"unknown","modules":["kqueue"],"versions":[{"version":"15.1-RELEASE","lessThan":"p4","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":"2026-10-16T03:56:54.101667Z","id":"CVE-2026-58099","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:15.1:-:*:*:*:*:*:*","matchCriteriaId":"BD327D43-A2DC-49B5-A578-D2116E1E12F3"},{"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"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.1:p3:*:*:*:*:*:*","matchCriteriaId":"C75C73C4-ED12-44D9-85EF-A0388D9ECFA2"}]}]}],"references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:65.kqueue.asc","source":"secteam@freebsd.org","tags":["Vendor Advisory"]}]}}