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CVE-2008-3431

The VBoxDrvNtDeviceControl function in VBoxDrv.sys in Sun xVM VirtualBox before 1.6.4 uses the METHOD_NEITHER communication method for IOCTLs and does not properly validate a buffer associated with the Irp object, which allows local users to gain privileges by opening the \\.\VBo…

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The VBoxDrvNtDeviceControl function in VBoxDrv.sys in Sun xVM VirtualBox before 1.6.4 uses the METHOD_NEITHER communication method for IOCTLs and does not properly validate a buffer associated with the Irp object, which allows local users to gain privileges by opening the \\.\VBoxDrv device and calling DeviceIoControl to send a crafted kernel address.
CVSS 8.8 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.4/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 8.8: +1.32
  • Fresh EPSS: 6.88%: +0.03

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 6 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

BleepingComputer
Press · 04 Mar 2022, 08:00 · CISA warns organizations to patch 95 actively exploited bugs - BleepingComputer
Rapid7
Press · 13 Dec 2021, 08:00 · Driver-Based Attacks: Past and Present - Rapid7
Microsoft
Press · 08 Dec 2021, 08:00 · Improve kernel security with the new Microsoft Vulnerable and Malicious Driver Reporting Center - Microsoft
Unit 42
Press · 17 Jun 2020, 07:00 · AcidBox: Rare Malware Repurposing Turla Group Exploit Targeted Russian Organizations - Unit 42
Microsoft
Press · 17 Mar 2020, 07:00 · Secured-core PCs: A brief showcase of chip-to-cloud security against kernel attacks - Microsoft
See all 6 source documents
Ars Technica
Press · 07 Feb 2020, 08:00 · Windows trust in abandoned code lets ransomware burrow deep into targeted machines - Ars Technica

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.4 (2026-11-02 15:11). The curve appears once the score changes.

Public exploit evidence

1

Public exploit entries / repo candidates

Source entries and unverified repository candidates are counted separately.

Public exploit evidence
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 8.8; EPSS 6.9%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
local access, low privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:57:20.402472+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
05 Aug 2008, 19:20
First press mention
07 Feb 2020, 08:00
Added to the CISA KEV catalog
03 Mar 2022, 00:00
Latest press mention
04 Mar 2022, 08:00
Score calculated
05 Nov 2026, 13:57
PoCs on GitHub
1 repositories