CVE-2018-6921: FreeBSD vulnerability

CVE-2018-6921: In FreeBSD before 11.1-STABLE(r332066) and 11.1-RELEASE-p10, due to insufficient initialization of memory c...

In FreeBSD before 11.1-STABLE(r332066) and 11.1-RELEASE-p10, due to insufficient initialization of memory copied to userland in the network subsystem, small amounts of kernel memory may be disclosed to userland processes. Unprivileged authenticated local users may be able to access small amounts of privileged kernel data.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 17, 2024, 02:02 UTC (UTC+00:00)

Security readout for executives and security teams

This FreeBSD issue can expose small pieces of kernel memory to local authenticated users. It is not described as a remote compromise, but leaked privileged memory can still aid investigation, lateral movement, or chained attacks on shared systems. Exposure is most relevant on FreeBSD 11.x hosts where unprivileged authenticated local users can run processes. Shared servers, shell hosts, build systems, and multi-user appliances deserve priority review. Treat this as a controlled remediation item unless exposed systems support untrusted local users. It is not sourced as remotely exploitable or actively exploited, but privileged memory disclosure on shared infrastructure is still operationally meaningful. Mitigation focus: Upgrade affected FreeBSD 11.x systems to 11.1-RELEASE-p10, 11.1-STABLE r332066, or later supported releases.; Apply the relevant FreeBSD errata guidance for FreeBSD-EN-18:05.mem.; Reduce unnecessary local shell or process execution access on affected systems..

Prepared: Jun 7, 2026, 13:40 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

Conservative CVE-to-ATT&CK context

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CVE-2018-6921 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: May 8, 2018, 19:00 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
https://security.freebsd.org/advisories/FreeBSD-EN-18:05.mem.ascCVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

FreeBSDFreeBSDFreeBSD 11.x prior to 11.1-RELEASE-p10.Listed

Weakness

CWE details

No CWE listed

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