CVE-2006-6730: n/a vulnerability

CVE-2006-6730: OpenBSD and NetBSD permit usermode code to kill the display server and write to the X.Org /dev/xf86 device,...

OpenBSD and NetBSD permit usermode code to kill the display server and write to the X.Org /dev/xf86 device, which allows local users with root privileges to reduce securelevel by replacing the System Management Mode (SMM) handler via a write to an SMRAM address within /dev/xf86 (aka the video card memory-mapped I/O range), and then launching the new handler via a System Management Interrupt (SMI), as demonstrated by a write to Programmed I/O port 0xB2.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 20:34 UTC (UTC+00:00)

Security readout for executives and security teams

This is a legacy local hardening-bypass issue affecting OpenBSD and NetBSD in the cited record. A user who already has root access could abuse X.Org device access to lower securelevel protections. It is not a remote entry point, but it matters on systems relying on securelevel to contain root-level compromise. Likely limited to old OpenBSD or NetBSD systems using X.Org/DRI-style device access where securelevel is a meaningful control. Exposure is unclear because the source bundle does not identify affected versions or fixed releases. Treat as a targeted legacy-risk item, not an internet-wide emergency. Prioritize if the organization still operates old BSD graphical systems or depends on securelevel to limit damage after root compromise. Mitigation focus: Check OpenBSD and NetBSD vendor guidance for affected and fixed versions.; Upgrade unsupported legacy BSD systems to maintained releases.; Avoid running X.Org/DRI on hosts relying on securelevel protections..

Prepared: Jun 29, 2026, 08:30 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: Dec 26, 2006, 23:00 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

1Source 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

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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