CVE-2026-58086 — ktrace(2) privilege incorrectly validated in jails

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
FreeBSD / FreeBSD	affected 15.1-RELEASE before p2; affected 15.0-RELEASE before p12

CWE

CWE-273

References

https://security.freebsd.org/advisories/FreeBSD-SA-26:53.ktrace.asc

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.