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NVD and BleepingComputer confirm Microsoft patched CVE-2026-68840, a race condition in the Windows USB Driver, via September 2026 Patch Tuesday.

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Home/Tech/Microsoft Patches High-Severity Race Condition in Windows USB Driver
VERIFIEDBy Xavier Rivera· ·1 min read

Microsoft Patches High-Severity Race Condition in Windows USB Driver

Microsoft has released security updates for CVE-2026-68840, a race condition in the Windows USB Driver that lets an authorized local attacker elevate privileges. The high-severity flaw, scored 7.0, was published September 8, 2026, and requires winning a race condition with no listed workarounds.

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Microsoft Patches High-Severity Race Condition in Windows USB Driver
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TL;DRAI · 60 sec read

Microsoft releases security updates for CVE-2026-68840, a high-severity race condition in the Windows USB driver caused by improper synchronization of shared resources. This enables local attackers to escalate privileges. The vulnerability has a CVSS score of 7.0, impacts various Windows versions, and gets fixed in the September 2026 Patch Tuesday.

Microsoft has released security updates addressing CVE-2026-68840, a high-severity vulnerability in the Windows USB Driver.

A race condition enables local privilege escalation. The flaw stems from concurrent execution using a shared resource with improper synchronization. An authorized local attacker can exploit it to elevate privileges.
A race condition enables local privilege escalation.

Exploitation requires winning a race condition. The advisory states no workarounds are available.
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The vulnerability carries a CVSS score of 7.0. Microsoft's advisory lists a CVSS v3.1 base score of 7.0, rated High. The vector is AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Exploitation requires winning a race condition.
The vulnerability was published on September 8, 2026. It affects various Windows client and server versions.
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Fixes arrived with September 2026 Patch Tuesday. Microsoft provides the security updates as part of its monthly patching cycle. The advisory links to the full update guide and affected software table.

EXPERT TAKE

Enterprise teams should prioritize this month's Patch Tuesday rollout, as the local privilege escalation risk in a core USB driver component affects both client and server editions with no alternative mitigations.

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