CVE-2017-1086: FreeBSD vulnerability

CVE-2017-1086: In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p4, 11.0-RELEASE-p15, 10.4-STABLE, 10.4-RELEASE-p3, and 10.3-RE...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 16, 2024, 23:25 UTC (UTC+00:00)

Security readout for executives and security teams

FreeBSD could expose small pieces of kernel stack memory to a local debugger through ptrace. This is an information leak, not a documented remote compromise. The business concern is highest on multi-user or shared FreeBSD systems where untrusted users can run local debugging operations. Exposure is limited to FreeBSD systems before 11.1-STABLE, 11.1-RELEASE-p4, 11.0-RELEASE-p15, 10.4-STABLE, 10.4-RELEASE-p3, and 10.3-RELEASE-p24. Risk is most relevant where local users or services can exercise ptrace/debugger functionality. Treat as a scheduled security update unless affected systems host untrusted local users. It does not have cited active exploitation or remote attack evidence, but kernel memory disclosure can increase risk when chained with other vulnerabilities. Mitigation focus: Upgrade FreeBSD to the fixed release or stable branch named in the vendor advisory.; Prioritize shared, multi-user, development, and hosting systems running affected FreeBSD versions.; Review vendor guidance before applying operational workarounds or kernel changes..

Prepared: Jun 12, 2026, 20:07 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Nov 16, 2017, 20:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
FreeBSD-SA-17:08CVE reference · vendor-advisory, x_refsource_FREEBSD

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

FreeBSDFreeBSDAll supported versions of FreeBSDListed

Weakness

CWE details

No CWE listed

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