CVE-2017-1086

Name: CVE-2017-1086
Creator: NVD / NIST
Published: 2017-11-16T20:29:00.207+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.36%

Last modified Jun 17, 2026

CVE-2017-1086 is a vulnerability of currently unknown severity. In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p4, 11.0-RELEASE-p15, 10.4-STABLE, 10.4-RELEASE-p3, and 10.3-RELEASE-p24, not all information in the struct ptrace_lwpinfo is relevant for the state of any thread, and the kernel does not fill the irrelevant bytes or short strings. Since the structure filled by the kernel is allocated on the kernel stack and copied to userspace, a leak of information of the kernel stack of the thread is possible from the debugger. EPSS estimates a 0.36% chance of exploitation in the next 30 days.

Description

In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p4, 11.0-RELEASE-p15, 10.4-STABLE, 10.4-RELEASE-p3, and 10.3-RELEASE-p24, not all information in the struct ptrace_lwpinfo is relevant for the state of any thread, and the kernel does not fill the irrelevant bytes or short strings. Since the structure filled by the kernel is allocated on the kernel stack and copied to userspace, a leak of information of the kernel stack of the thread is possible from the debugger. As a result, some bytes from the kernel stack of the thread using ptrace (PT_LWPINFO) call can be observed in userspace.

Metrics

EPSS Probability

0.36%

28.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Freebsd	Freebsd	All versions

References

http://www.securityfocus.com/bid/101861Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039809Third Party Advisory, VDB Entry
https://www.freebsd.org/security/advisories/FreeBSD-SA-17:08.ptrace.ascVendor Advisory
http://www.securityfocus.com/bid/101861Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039809Third Party Advisory, VDB Entry
https://www.freebsd.org/security/advisories/FreeBSD-SA-17:08.ptrace.ascVendor Advisory

Timeline

Published: Nov 16, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-1086?

How severe is CVE-2017-1086?

Severity scoring for CVE-2017-1086 is pending analysis. The EPSS model estimates a 0.36% probability of exploitation in the next 30 days.

How do I fix CVE-2017-1086?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-1086?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST