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In the Linux kernel, the following vulnerability has been resolved: drm/xe/guc: Check GuC running state before deregistering exec queue In normal… (CVE-2025-40166)

0
High
Published: 11/12/2025 (11/12/2025, 12:30:28 UTC)
Source: GCVE Database

Description

A vulnerability in the Linux kernel's drm/xe/guc driver was resolved that could lead to improper cleanup of exec queue resources if the driver is forced to unbind while the exec queue is still running. This occurs because the driver may attempt to deregister an exec queue after the GuC (Graphics microcontroller) has stopped and communication is disabled, preventing proper resource cleanup and causing errors. The fix ensures resources are released directly when the GuC is not running.

CVSS v3.1

Score 7.8high

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 07/30/2026, 17:22:40 UTC

Technical Analysis

The vulnerability in the Linux kernel drm/xe/guc component involves the deregistration of exec queues without verifying the GuC running state. Normally, exec queues are deregistered only after GuC confirms completion. However, if the driver unbinds while the exec queue is active and GuC communication is disabled, the driver cannot receive responses, leading to resource cleanup failures. The patch changes the logic to check the GuC running state before deregistration and directly release resources if GuC is not running, preventing errors such as 'GUC ID manager unclean'.

Potential Impact

This vulnerability can cause improper cleanup of GPU exec queue resources, potentially leading to driver errors and instability in the graphics subsystem. The CVSS vector indicates high impact on confidentiality, integrity, and availability, but no known exploits are reported in the wild.

Mitigation Recommendations

A fix has been implemented in the Linux kernel to address this issue by checking the GuC running state before deregistering exec queues and releasing resources directly if GuC is not running. Users should apply the updated kernel version containing this patch once available. Patch status is not explicitly confirmed in the provided data; check the vendor or Linux kernel advisories for the official fix and update guidance.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
GHSA-v9hw-4wx3-7mqf
Osv Schema Version
1.4.0
Aliases
["CVE-2025-40166"]
Database Specific Severity
HIGH
Cvss Version
3.1

Threat ID: 6a6b72d59c2644c7f8479f66

Added to database: 07/30/2026, 15:50:45 UTC

Last enriched: 07/30/2026, 17:22:40 UTC

Last updated: 09/10/2026, 19:38:47 UTC

Views: 13

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