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.
Analysis
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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| FreeBSD | FreeBSD | unknown |
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Tracking
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Wed, 19 Aug 2026 07:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | ktrace(2) privilege incorrectly validated in jails | |
| Weaknesses | CWE-273 | |
| References |
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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: freebsd
Published:
Updated: 2026-08-19T07:42:10.902Z
Reserved: 2026-06-29T01:40:17.498Z
Link: CVE-2026-58086
Vulnrichment
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NVD
Status : Received
Published: 2026-08-19T08:17:12.777
Modified: 2026-08-19T08:17:12.777
Link: CVE-2026-58086
Redhat
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OpenCVE Enrichment
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CWE-273
Improper Check for Dropped Privileges