Vulnerability details
CVE-2026-58086
FreeBSD FreeBSD
ktrace(2) privilege incorrectly validated in jails
CVSS 3.1
8.1High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.1High | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| FreeBSD | FreeBSD | 15.0-RELEASE ≤ v < p12 | CVEProject cvelistV5 (CNA) |
| FreeBSD | FreeBSD | 15.1-RELEASE ≤ v < p2 | CVEProject cvelistV5 (CNA) |
References and advisories
1
Kolun on Telegram @kolunsec
Exploited CVEs, key news and a daily digest
Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.
Details
- Published
- 2026-08-19
- Last updated
- 2026-08-27
- State
- Published
- Assigner (CNA)
- freebsd
Exploit prediction (EPSS)
0.37%
Probability of exploitation in 30 days
31.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-273Improper Check for Dropped Privileges