{"id":"CVE-2026-58086","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-58086","summary":"As an inadvertent side effect of an unrelated code change, PRIV_KTRACE was always denied to a jailed root user.  Tracing configured by a jailed root user was therefore not flagged as…","details":"As an inadvertent side effect of an unrelated code change, PRIV_KTRACE was always denied to a jailed root user.  Tracing configured by a jailed root user was therefore not flagged as privileged.\n\nAn unprivileged user in a jail that has permission to debug the target process can modify the jailed root user's ktrace(2) flags, or disable tracing outright.  A jailed root user therefore cannot reliably trace unprivileged processes.","published":"2026-08-19T08:17:12.777","modified":"2026-08-27T17:18:53.070","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:53.ktrace.asc"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-27T17:18:53.070"}}