ktrace(2) privilege incorrectly validated in jails
Priority LOW 37CWE-273Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00378 31st percentileScored 2026-11-07
Fix Fixed FreeBSD (FreeBSD): p2, p12
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| FreeBSD | FreeBSD | 15.1-RELEASE to before p2; 15.0-RELEASE to before p12 | p2, p12 | Patch available | CNA |
- FreeBSD VendorFreeBSD Affected 15.1-RELEASE to before p2; 15.0-RELEASE to before p12 Fixed in p2, p12 Patch available CNA
CPE configurations NVD · 16
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:freebsd:freebsd:15.0:-:*:*:*:*:*:* | 15.0 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:15.0:p1:*:*:*:*:*:* | 15.0 p1 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:15.0:p10:*:*:*:*:*:* | 15.0 p10 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:15.0:p11:*:*:*:*:*:* | 15.0 p11 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:15.0:p2:*:*:*:*:*:* | 15.0 p2 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:15.0:p3:*:*:*:*:*:* | 15.0 p3 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:15.0:p4:*:*:*:*:*:* | 15.0 p4 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:15.0:p5:*:*:*:*:*:* | 15.0 p5 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:15.0:p6:*:*:*:*:*:* | 15.0 p6 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:15.0:p7:*:*:*:*:*:* | 15.0 p7 | Vulnerable | FreeBSD |
- cpe:2.3:o:freebsd:freebsd:15.0:-:*:*:*:*:*:* Versions 15.0 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:15.0:p1:*:*:*:*:*:* Versions 15.0 p1 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:15.0:p10:*:*:*:*:*:* Versions 15.0 p10 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:15.0:p11:*:*:*:*:*:* Versions 15.0 p11 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:15.0:p2:*:*:*:*:*:* Versions 15.0 p2 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:15.0:p3:*:*:*:*:*:* Versions 15.0 p3 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:15.0:p4:*:*:*:*:*:* Versions 15.0 p4 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:15.0:p5:*:*:*:*:*:* Versions 15.0 p5 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:15.0:p6:*:*:*:*:*:* Versions 15.0 p6 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:15.0:p7:*:*:*:*:*:* Versions 15.0 p7 Vulnerable ·FreeBSD
Show 6 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:freebsd:freebsd:15.0:p8:*:*:*:*:*:* | 15.0 p8 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:15.0:p9:*:*:*:*:*:* | 15.0 p9 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:15.1:-:*:*:*:*:*:* | 15.1 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:15.1:p1:*:*:*:*:*:* | 15.1 p1 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:15.1:rc2:*:*:*:*:*:* | 15.1 rc2 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:15.1:rc3-p1:*:*:*:*:*:* | 15.1 rc3-p1 | Vulnerable | FreeBSD |
- cpe:2.3:o:freebsd:freebsd:15.0:p8:*:*:*:*:*:* Versions 15.0 p8 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:15.0:p9:*:*:*:*:*:* Versions 15.0 p9 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:15.1:-:*:*:*:*:*:* Versions 15.1 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:15.1:p1:*:*:*:*:*:* Versions 15.1 p1 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:15.1:rc2:*:*:*:*:*:* Versions 15.1 rc2 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:15.1:rc3-p1:*:*:*:*:*:* Versions 15.1 rc3-p1 Vulnerable ·FreeBSD
Remediation
- Fix · CNA FreeBSD (FreeBSD) Fixed in p2, p12
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
FreeBSD p12, p2
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-41834 Kernel stack disclosure via timer_settime(2)Priority LOW 24
Timeline
- 2026-10-02 Threatist record created from CVE-2026-58086
- 2026-10-03 Alias added: GHSA-5q67-rff6-c784
References
More Freebsd vulnerabilities
- TI-2011-04182 Buffer overflow in libtelnet/encrypt.c in telnetd in FreeBSD 7.3 through 9.0, MIT… CVSS 2.0HIGH 10.0
- TI-2007-03684 Integer overflow in print-bgp.c in the BGP dissector in tcpdump 3.9.6 and earlier allows… CVSS 3.1CRITICAL 9.8
- TI-2002-00376 Integer overflow in xdr_array function in RPC servers for operating systems that use… CVSS 3.1CRITICAL 9.8
- TI-2024-05929 Openssh: regresshion - race condition in ssh allows rce/dos CVSS 3.1HIGH 8.1
- TI-2003-00437 Off-by-one error in the fb_realpath() function, as derived from the realpath function in… CVSS 3.1CRITICAL 9.8
- TI-2003-00642 The prescan function in Sendmail 8.12.9 allows remote attackers to execute arbitrary code… CVSS 2.0HIGH 10.0
Sources
- CVE-2026-58086 · CVE Program
- CVE-2026-58086 · NVD
- FIRST EPSS
- GHSA-5q67-rff6-c784 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences