Null Pointer Dereference in Linux drm/xe GUC Stack_Depot Usage

Publication date: 2025-12-22

Last updated on: 2025-12-22

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: drm/xe/guc: Fix stack_depot usage Add missing stack_depot_init() call when CONFIG_DRM_XE_DEBUG_GUC is enabled to fix the following call stack: [] BUG: kernel NULL pointer dereference, address: 0000000000000000 [] Workqueue: drm_sched_run_job_work [gpu_sched] [] RIP: 0010:stack_depot_save_flags+0x172/0x870 [] Call Trace: [] <TASK> [] fast_req_track+0x58/0xb0 [xe] (cherry picked from commit 64fdf496a6929a0a194387d2bb5efaf5da2b542f)

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Meta Information

Published

2025-12-22

Last Modified

2025-12-22

Generated

2026-07-06

AI Q&A

2025-12-23

EPSS Evaluated

2026-07-05

NVD

CVE-2025-68326

EUVD

EUVD-2025-204733

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability is a bug in the Linux kernel's drm/xe/guc component related to the stack_depot usage. Specifically, when the CONFIG_DRM_XE_DEBUG_GUC option is enabled, a missing initialization call to stack_depot_init() causes a NULL pointer dereference in the kernel, leading to a crash (BUG). This occurs during GPU scheduling workqueue operations, resulting in a kernel panic or instability.

Impact Analysis

This vulnerability can cause the Linux kernel to crash due to a NULL pointer dereference when certain GPU debug features are enabled. This can lead to system instability, unexpected reboots, or denial of service conditions on affected systems running the vulnerable kernel with the specific debug configuration enabled.

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