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.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://security.freebsd.org/advisories/FreeBSD-SA-26:53.ktrace.asc	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:freebsd:freebsd:15.0:-::::::
	cpe:2.3:o:freebsd:freebsd:15.0:p1::::::
	cpe:2.3:o:freebsd:freebsd:15.0:p10::::::
	cpe:2.3:o:freebsd:freebsd:15.0:p11::::::
	cpe:2.3:o:freebsd:freebsd:15.0:p2::::::
	cpe:2.3:o:freebsd:freebsd:15.0:p3::::::
	cpe:2.3:o:freebsd:freebsd:15.0:p4::::::
	cpe:2.3:o:freebsd:freebsd:15.0:p5::::::
	cpe:2.3:o:freebsd:freebsd:15.0:p6::::::
	cpe:2.3:o:freebsd:freebsd:15.0:p7::::::
	cpe:2.3:o:freebsd:freebsd:15.0:p8::::::
	cpe:2.3:o:freebsd:freebsd:15.0:p9::::::
	cpe:2.3:o:freebsd:freebsd:15.1:-::::::
	cpe:2.3:o:freebsd:freebsd:15.1:p1::::::
	cpe:2.3:o:freebsd:freebsd:15.1:rc2::::::
	cpe:2.3:o:freebsd:freebsd:15.1:rc3-p1::::::

History

No history.

Information

Published : 2026-08-19 08:17

Updated : 2026-08-31 18:44

NVD link : CVE-2026-58086

Mitre link : CVE-2026-58086

CVE.ORG link : CVE-2026-58086

JSON object : View

Products Affected

freebsd

freebsd

CWE

CWE-273

Improper Check for Dropped Privileges

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