CVE-2026-58086 — ktrace(2) privilege incorrectly validated in jails
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 flagg…
Published: 2026-08-19 · CVSS: 8.1 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7