{"id":"CVE-2026-58099","revision":"56dfb9d770e847cbbb78cb3caf88a12d","records":[{"revision":"56dfb9d770e847cbbb78cb3caf88a12d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-58099","aliases":[],"title":"Memory safety bugs in kqueue copy-on-fork implementation","description":"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.","state":0,"publishedAt":"2026-10-15T06:31:18.042+00:00","modifiedAt":"2026-10-19T14:10:47.179+00:00","affected":[{"ecosystem":"Vendor product","name":"FreeBSD","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unknown\",\n                    \"modules\": [\n                        \"kqueue\"\n                    ],\n                    \"product\": \"FreeBSD\",\n                    \"vendor\": \"FreeBSD\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"versionType\": \"release\",\n                            \"version\": \"15.1-RELEASE\",\n                            \"lessThan\": \"p4\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://security.freebsd.org/advisories/FreeBSD-SA-26:65.kqueue.asc"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-58099","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-58099","identifiers":["CVE-2026-58099"]},"retained":false,"historicalAffected":[]}],"coverage":[]}