Vulnerability Details CVE-2026-58086
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.
An 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 17.3%
CVSS Severity
CVSS v3 Score 8.1