---
id: CVE-2025-68193
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/xe/guc: Add devm release action to safely tear down CT

  When a buffer object (BO) is allocated with the XE_BO_FLAG_GGTT_INVALIDATE
  flag, the driver initiates TLB in…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/xe/guc: Add devm release action to safely tear down CT

  When a buffer object (BO) is allocated with the XE_BO_FLAG_GGTT_INVALIDATE
  flag, the driver initiates TLB in…
severity: none
published: '2025-12-16'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-68193'
references:
  - url: 'https://git.kernel.org/stable/c/52faa05fcd9f78af99abebe30a4b7b444744c991'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ee4b32220a6b41e71512e8804585325e685456ba'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00185
epssPercentile: 0.07485
ingestedAt: '2026-10-14T13:30:58.450Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

drm/xe/guc: Add devm release action to safely tear down CT

When a buffer object (BO) is allocated with the XE_BO_FLAG_GGTT_INVALIDATE
flag, the driver initiates TLB invalidation requests via the CTB mechanism
while releasing the BO. However a premature release of the CTB BO can lead
to system crashes, as observed in:

Oops: Oops: 0000 [#1] SMP NOPTI
RIP: 0010:h2g_write+0x2f3/0x7c0 [xe]
Call Trace:
 guc_ct_send_locked+0x8b/0x670 [xe]
 xe_guc_ct_send_locked+0x19/0x60 [xe]
 send_tlb_invalidation+0xb4/0x460 [xe]
 xe_gt_tlb_invalidation_ggtt+0x15e/0x2e0 [xe]
 ggtt_invalidate_gt_tlb.part.0+0x16/0x90 [xe]
 ggtt_node_remove+0x110/0x140 [xe]
 xe_ggtt_node_remove+0x40/0xa0 [xe]
 xe_ggtt_remove_bo+0x87/0x250 [xe]

Introduce a devm-managed release action during xe_guc_ct_init() and
xe_guc_ct_init_post_hwconfig() to ensure proper CTB disablement before
resource deallocation, preventing the use-after-free scenario.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.